A Teaching with Technology White Paper
http://www.cmu.edu/teaching
Classroom
Response
Systems
Ashley Deal | 11.30.2007
Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License http://creativecommons.org/licenses/by-nc-nd/3.0/us/
How to foster meaningful engagement among students is a long-
standing question in large lecture halls. In effort to address this
issue, electronic classroom response systems (CRS) have been
tested and used in higher education classrooms since the 1960’s.
The studies summarized in this paper show that CRS can facili-
tate the process of drawing out students’ prior knowledge,
maintaining student attention, and creating opportunities for
meaningful engagement. They can also assist instructors in
assessing student comprehension and developing classroom
activities that allow for the application of key concepts to
practical problems.
Classroom Response Systems
2
Teaching with Technology November 2007
There are
three general
categories
of activities
and equipment
involved in
using a
classroom
response
system:
Instruction and
questioning
Response and
display
Data
management
and analysis
W
orking Definition
A classroom response system (CRS) is any
system used in a face-to-face setting to
poll students and gather immediate feed-
back in response to questions posed by
instructors. A non-technical example of
a CRS is an instructor asking students to
raise their hands to agree or disagree with
a given question. A slightly more sophisti-
cated practice involves the use of colored
flashcards, with each color corresponding
to a possible response in a multiple-choice
question.
Over the past 30 years, technologists
have developed and refined electronic
response systems that allow students to
key in responses using transmitters (also
called “remotes” or “clickers”). The
main advantages of electronic response
systems over non-technical methods for
gathering feedback are the anonymity of
responses, and the ability to immediately
project response graphs overhead for the
class to see. Electronic response systems
can also store response data for future
analysis and assessment.
There are three categories of activities
and equipment involved in using a class-
room response system: presentation and
questioning, student response and display,
and data management and analysis.
Instruction and questioning
Software for most classroom response
systems has been designed to integrate
with common presentation software, like
Microsoft PowerPoint. Some additional
effort is required to develop question
slides, but since many instructors already
use presentation software (particularly
instructors in large lecture courses, where
the use of CRS is most appealing), the
extra effort is minimized.
The kinds of questions posed by the
instructor can range from simple factual
recall to questions designed specifically to
reveal and challenge common misconcep-
tions in a given topic. Development of
effective questions is crucial to the success
of teaching with CRS, and is discussed in
detail in a later section.
In class, the instructor presents con-
cepts and materials, interspersed with
slides asking for feedback from students.
Questions are typically in true or false or
multiple choice format. Question slides
can be placed in line with regular lecture
presentations so instructors can gather
feedback on the fly, without switching
applications during the presentation.
Students are typically given a short period
of time to key in responses.
Response and display
Students key in responses using small
remote transmitters. These transmitters
send signals to a receiver that is con-
nected to the instructor’s laptop or lectern
PC. Software on the instructor’s machine
instantly tabulates and graphs student
responses, and these simple graphs can be
displayed on the following presentation
slide. One of the more compelling aspects
of using CRS is that students can com-
pare their own responses to the responses
of other students in the class, which can
encourage a level of metacognition that
might not otherwise occur.
Once students see the distribution
of responses, many instructors take the
opportunity to encourage discussion, ask-
ing students to reconsider the question in
groups and to reach an agreement about
the best response. Instructors often fol-
low the discussion with a second cycle of
questioning, response, and display before
wrapping up the presentation of a given
concept. This approach is often referred
to as “peer instruction.”
Data management and analysis
Most classroom response systems allow
instructors to export and save response
data for future analysis and assessment.
Some systems also integrate with course
management systems, like Blackboard.
This integration allows instructors to
save and track student responses over the
course of the semester, and simplifies the
assessment process.
Instructors can project
response graphs
overhead for the class
to see, so students
can compare their own
responses to those of
their classmates.
Classroom Response Systems
3
Teaching with Technology November 2007
Instruction & Questioning
Response & Display
Data Management & Analysis
Instructor presents concepts and
materials, interspersed with slides
asking for feedback from students.
Questions are typically in true or false
or multiple choice format.
Students key in their responses using
small remote transmitters. These
transmitters send signals to a receiver
that is connected to the instructor’s
laptop or lectern PC.
Many instructors then ask students to
discuss the responses in groups, and
to reach an agreement about the best
response. This discussion can be
followed with a second cycle of
questioning, response, and display.
Software on the instructors machine
instantly tabulates and graphs
student responses, and these simple
graphs can be displayed on the
following presentation slide.
Most classroom response systems
allow instructors to export and save
response data for future analysis and
evaluation. Some systems also
integrate with course management
systems, like Blackboard, to simplify
the assessment process.
Classroom Response Systems: Technical Components and Interactions
Classroom Response Systems
4
Teaching with Technology November 2007
the relevant literature—increasing improve-
ment in terms of learning outcomes.
At the most basic level of implemen-
tation, classroom response systems serve
as means for the instructor to monitor
the classroom. The instructor uses CRS
to take attendance, to ensure some level
of participation, and to increase the stu-
dents’ level of attention during the lecture.
The instructor might also ask very basic
questions about reading assignments as
a means to verify whether students com-
pleted the reading. In this scenario, the
instructor uses CRS as a way to encour-
age attendance and some basic level of
attention and participation, but makes
very few intentional changes to the
sequence, delivery, or duration of lectur-
ing on a given concept.
At the second level of implementa-
tion, the instructor uses CRS to gather
real-time information about student com-
prehension of a given concept. From the
responses, the instructor is able to deter-
mine whether she should spend more
time explaining an idea, or if the majority
of the class understands the idea, allow-
ing her to move on to the next topic. The
students help set the pace of instruction
with clear indication of their comprehen-
sion or confusion.
The third approach to teaching with
classroom response often involves a trans-
formation in the instructor’s teaching
philosophy and strategies. This approach
involves interspersing the presentation
of concepts with question and response
cycles, followed by periods of discussion
where students defend their responses and
try to persuade classmates with their rea-
soning. Discussions are typically wrapped
up with another question and response
cycle where students can indicate their
new response to the same question.
Monitoring the Classroom
The motivation to use classroom response
systems most commonly derives from a
desire to stimulate student engagement.
Instructors in large lecture halls often
struggle against what Rand Guthrie and
Anna Carlin call “the sea of slouching
bodies and expressionless faces” (2004).
Efforts to engage students with questions
yield few volunteers, and instructors often
High-enrollment courses present chal-
lenges to many basic principles and
established best practices in teaching
and learning. Instructors in large lecture
courses often face difficulty drawing
out prior knowledge or misconceptions,
motivating students and maintaining
their attention, creating opportunities
for meaningful engagement, assessing
student comprehension, and developing
classroom activities that allow for the
application of key concepts to practical
problems. Yet high-enrollment lectures
remain the norm for introductory courses
in many disciplines, and instructors have
long sought tools and teaching strategies
to help overcome these challenges.
For over 40 years, electronic classroom
response systems have been investigated
as a potential bridge for the communica-
tion gap between lecturers and students.
Early systems were hard-wired into
classrooms, with an input device at each
seat in a lecture hall. These systems were
costly and difficult to use, given the lack
of graphical user interface and the com-
plexity of software for data manipulation
and display.
Improvements to hardware and soft-
ware solutions and vast changes to the
technology landscape have created a
resurgent interest in CRS in the past
decade. New systems are much more
affordable, often portable, and take
advantage other technologies already in
use in most large lecture halls (i.e., pre-
sentation software, lectern hardware, and
projection systems).
There are essentially three levels of
implementation of classroom response sys-
tems, each with progressively more change
in pedagogical approach, and—as best we
can determine through an examination of
Most strategies
for using CRS
fall into one of
three general
categories of
implementation:
Monitoring
the classroom
Attendance,
attention,
completion
of assigned
readings
Audience-paced
instruction
Real-time
evaluation
of student
comprehension
Peer instruction
Question/
response cycle
combined with
discussion and
debate among
students
Case Studies & Assessm
ents
Lecture courses can
present challenges
to basic principles
and established best
practices in teaching
and learning.
Classroom Response Systems
5
Teaching with Technology November 2007
cannot determine where their lectures
succeed or fail until examination time.
Even at the most basic level of imple-
mentation, where the instructor makes
very few intentional changes to the
lecture strategy, it seems that the use of
classroom response systems can contrib-
ute to an instructor’s participation and
attendance goals.
Certainly, attendance policies can be
much harder to enforce in high-enrollment
courses than in smaller courses. In an
introductory Earth Science course at Penn
State University, the instructor used CRS
responses over the course of the semester
as 15% of the final course grade (Greer
and Heaney, 2004). Whether responses
were correct or not was not a factor, only
whether students participated. Mean atten-
dance ranged from 81% to 84% over the
four CRS semesters measured, compared
to an estimated 50% by the midpoint of
semesters without CRS. Head counts were
also conducted to account for “the pos-
sibility that absent students had handed
their remote control units to friends
who entered responses on their behalf.”
Discrepancies between CRS attendance
numbers and the results of head counts
were typically +/- 2% (p. 348).
Although the comparison numbers
are estimates, not directly measured in a
controlled setting, many other CRS stud-
ies report similar findings. Judson and
Sawada conducted an extensive literature
review on response systems, and report
that research “from the 1960s through the
late 1990s found that the use of electronic
response systems made students more
likely to attend class” (2002, p. 177).
Classroom response systems have been
evaluated in several studies conducted in
the context of continuing medical educa-
tion (CME) lectures and seminars. Survey
results from these and other studies indi-
cate that student satisfaction increases
in lectures using CRS (or ARS, audience
response systems). Further, students
report believing that the use of CRS has a
positive impact on their performance.
Miller et. al. (2003) conducted a
randomized controlled trial of audience
response systems at 42 clinical round table
programs across the country, and surveyed
nearly 300 participants about their experi-
ence in ARS and non-ARS lectures.
Results showed that “participants
who attended ARS lectures rated the
quality of the talk, the speaker, and their
level of attention significantly higher than
the non-ARS group” (p. 112). While
analysis did show that the differences
between the two groups were statistically
valid, the mean differences did not diverge
to the degree that might be expected.
Presentation quality was rated at a mean
of 3.9 on a scale of 5 for non-ARS, and
4.0 for non-ARS. Speaker quality was
rated 3.9 for non-ARS and 4.1 for ARS,
while “ability of presentation to maintain
attention and interest” was rated 4.2 for
non-ARS, and 4.4 for ARS (p. 113).
The survey instrument in Miller’s
study also included a handful of questions
assessing participants’ understanding of
the material presented, and results showed
no significant difference in learning out-
comes in ARS and non-ARS classes. The
researchers theorize that the types of fol-
low-up questions posed might not address
differences in “long-term retention and
application of knowledge” (p. 113).
In a separate study of CME lectures
covering multiple years of classes offered
with and without audience response sys-
tems, Copeland et. al. found that “lectures
in which the ARS was used were signifi-
cantly better rated than those in which the
ARS was not used” (1998, p. 231). Over
three years, mean ratings for lectures with
ARS were about 3.47 on a scale of 1 to
4, compared to non-ARS lectures rated as
3.32. Even more telling, however, was a
comparison of ratings from multiple lec-
tures from a single speaker, two delivered
with audience response, and one without.
In the lectures delivered without audience
Case Studies & Assessments
continued
“As we gaze out at the
sea of slouching bodies
and expressionless
faces, it is hard to resist
wondering if students
want less education and
more entertainment.”
Rand W. Guthrie and Anna Carlin
Classroom Response Systems
6
Teaching with Technology November 2007
response, the speaker received an average
rating of 3.09 on a scale of 1 to 4. In a lec-
ture delivered with audience response, the
same speaker was rated at 3.74 (p. 232).
Another form of classroom monitor-
ing with CRS is to present short quizzes
at the beginning or end of a lecture period.
Quizzes might cover homework or reading
assignments, or basic concepts from the
material covered in the previous or current
lecture. In the Fall of 2004, Richard Hall
and others at the University of Missouri,
Rolla, conducted a pilot evaluation of
classroom response systems in a General
Chemistry course (2005). They opened
each lecture with a brief quiz about the
assigned readings, and found that the
quizzes “served as a powerful motivator
not just for attendance, but class prepara-
tion as well” (p. 5). Students reported that
the quizzes helped them “learn what the
professor was wanting us to get out of the
reading,” and that “you can see the areas
you need to go back and look at when
you get questions wrong” (p. 5).
In the same study, student responses to
open-ended survey questions verified that
interspersing lectures with CRS question/
response cycles facilitates some level of
increased engagement and metacognition.
Students indicated that CRS “helped you
pay attention in class because you knew
you had a question coming,” and that
“it’s a good way to know if you under-
stand the material” (p. 5).
Evidence from these and other studies
indicates that the use of CRS in the class-
room, even at a basic level, can increase
attendance rates, bring problem areas to
the surface, and increase student satisfac-
tion with lectures.
Audience-Paced Instruction
Once instructors can see plainly what
students do and do not understand, the
intuitive next step is to adjust the pace
of presentation and explanation strate-
gies accordingly. The second level of CRS
implementation is a very natural exten-
sion of the first.
The previously discussed CRS pilot at
the University of Missouri was in many
ways a combination of all three levels
of using CRS. In addition to quizzes on
reading assignments and question cycles
throughout lecture (classroom monitor-
ing), the lectures were modified “based
on student understanding as represented
by the accuracy of their responses” (Hall
et. al., 2005, p.3). This modification is
the essence of audience-paced instruction.
Students were also often allowed to dis-
cuss the questions with classmates before
responding during the lecture. It is difficult
to characterize this study as distinctly one
type of CRS implementation. However,
because the main focus of the study is on
using CRS to increase engagement and
assess comprehension in order to custom-
ize lecture presentation, we present and
discuss their results primarily as class-
room monitoring and audience-paced
instruction.
Upon completion of the CRS pilot
course in Hall’s study, students were sur-
veyed regarding their perceptions of the
usefulness of CRS. Most students agreed
that CRS made class lectures more engag-
ing (87%), and enhanced their learning in
class lectures (73%). A smaller majority
also agreed that CRS “made the lectures
more motivational” (63%). Students
were divided as to whether CRS made
class more challenging, and most dis-
agreed (63%) that CRS helped them
better understand how course material
related to “real world” problems (p. 4).
Hall’s research group compared the
grade distribution for the semester with
classroom response to a previous semester
without CRS. While they acknowledge
a lack of specific control measures to
assure consistent grading standards and
to account for student ability across
semesters, they report that “grades were
Case Studies & Assessments
continued
Once instructors
see plainly what
students do and do
not understand, the
next step is to adjust
the explanations and
pace of presentation
accordingly.
Classroom Response Systems
7
Teaching with Technology November 2007
substantially better” in semesters with
CRS (p. 5). The percentage of students
earning A’s increased from 23% to 40%,
and the percentage of students receiving
C’s or D’s in the course decreased from
34% to 21% (p. 4).
The Penn State University study
discussed in the classroom monitoring
section also employed audience-paced
feedback methods to “encourage active
student participation” and allow “both
students and instructors to gauge student
comprehension instantaneously” (p.345).
Multiple instructors involved in this
study, teaching various sections of an
introductory science course. Although
instructors “shared the same course syl-
labus, lecture outline, course structure,
and grading scheme throughout each
semester,” they also developed their own
questions and maintained their “own
classroom ‘style’ during the semester”
(p.347). From the description of their CRS
implementation, it seems again that their
approach can not be described exclusively
as classroom monitoring, audience-paced
feedback, or peer instruction. However, at
a minimum instructors used CRS for real-
time assessment of student understanding,
and to directly address misconceptions
that were revealed through questioning.
Students were asked at the midpoint
of the semester to participate in a brief
anonymous survey to share their impres-
sions on the effectiveness of CRS. A
majority of students (65-77%) agreed
that the use of CRS helped them gauge
their understanding of course material,
and 71-85% agreed that it reinforced
important concepts presented in the lec-
ture. Between 65% and 81% of students
surveyed believed that the use of CRS in
lecture helped them learn (p. 348–349).
Qualitative feedback offered in course
evaluations emphasize that students appre-
ciate the anonymity of CRS (“it gave shy
kids the chance to participate,” “I don’t
feel put on the spot”); that CRS encour-
ages attendance (“gave you an incentive to
go to class,” “forces me to come to class”);
and that CRS facilitates more engagement
throughout the lecture (“helped everyone
get involved in such a large class,” “lets
me see if I am understanding the lecture
or not and it truly does give a nice break
from straight lecturing”). Negative
comments included frustration with atten-
dance monitoring (“extremely expensive
way to take attendance,” “dislike the way
the teacher uses the system”); cost (“one
of the most expensive classes I have ever
taken,” “overrated and expensive”); and
speculation that question and response
cycles are not the most effective use of
class time (“takes up class time when she
should be lecturing”) (p. 349).
Although students can be resistant
to any additional expenses associated
with classroom response systems, many
instructors equate the cost of the trans-
mitter to the purchase of a textbook.
Transmitters range in price from about
$20 for basic infrared systems to $125 for
the higher-end radio frequency systems.
Transmitters can also be sold at the end
of a semester to help offset the cost. For
more information on differences in avail-
able systems, see the Appendix.
Researchers at Eindhoven University
compared survey and performance data
for 2,500 students in course sections
delivered with audience-paced instruction
to equivalent data from 2,800 students
in sections delivered in the traditional
lecture format (Poulis et. al., 1998). This
study showed that the mean pass rate for
audience-paced instruction lectures “is
significantly higher than where traditional
methods have been employed” (p. 441).
The mean pass rate for traditional sec-
tions was less than 60%, while for CRS
sections it was over 80%. The research-
ers also note that the standard deviation
was substantially lower in the CRS group,
indicative of “a more consistent level of
comprehension throughout any given
class” (p. 441).
Certainly, this type of comparative per-
formance data, gathered in a controlled
Case Studies & Assessments
continued
The mean pass rate
for traditional lecture
sections was less
than 60%, while
for audience-paced
instruction sections,
it was over 80%.
Classroom Response Systems
8
Teaching with Technology November 2007
experimental environment, is a more
convincing measure than students’ self-
reported behavior and perceptions of the
effectiveness of CRS or audience-paced
instruction. What students believe and
report to believe about their learning and
behavior can differ significantly from what
they actually do and learn. Taken together,
the findings from the studies cited shed
some light on the potential impact of using
CRS to gauge student comprehension in
order to tailor the lecture delivery.
Peer Instruction
In this approach to teaching with CRS,
the lecture process shifts from the “bal-
listic” model of knowledge transfer (plan
and launch a lecture at the students, check
later to see if you hit the target) to a more
constructivist model, with the student
actively building knowledge as a result
of meaningful classroom interactions and
activities.
Peer instruction (PI) was pioneered
and has been evaluated extensively by
Eric Mazur and others in the Department
of Physics at Harvard University. Mazur
and his colleague, Catherine Crouch,
define peer instruction as the modifica-
tion of “the traditional lecture format
to include questions designed to engage
students and uncover difficulties with the
material” (2001, p. 970). They continue:
“A class taught with PI is divided into a
series of short presentations, each focused
on a central point and followed by a
related conceptual question.... Students
are given one or two minutes to formu-
late individual answers and report their
answers to the instructor. Students then
discuss their answers with others sit-
ting around them; the instructor urges
students to try to convince each other
of the correctness of their own answer
by explaining the underlying reasoning.
During the discussion, which typically
lasts two to four minutes, the instructor
moves around the room listening. Finally,
the instructor calls an end to the discus-
sion, polls students for their answers
again (which may have changed based on
the discussion), explains the answer, and
moves on to the next topic” (p. 970).
These discussion periods help students
understand the key concepts behind their
answers, and facilitate a deeper, more
practical comprehension than what might
result from a traditional lecture. While
electronic response systems are not essen-
tial to peer instruction, they certainly
facilitate the process more efficiently and
capture data more effectively than other
methods of gathering feedback (polling
by use of colored flash cards or show of
hands).
There are many articles documenting
the effectiveness of peer instruction (also
described as “interactive engagement”) in
various settings. In one such assessment,
Mazur and Crouch report on ten years of
findings from physics courses at Harvard
(2001). They analyze learning outcomes
in terms of conceptual mastery, using test
results from the Force Concept Inventory
(FCI), and quantitative problem solving,
using data from the Mechanics Baseline
Test (MBT). (The FCI and MBT are stan-
dard assessments of student performance
in physics. They are administered nation-
ally as pre- and post-tests to evaluate and
compare student learning in physics.)
The average normalized gain from pre-
and post-test FCI doubled in the first year
of implementing peer instruction in a cal-
culus-based physics course. Furthermore,
as the instructors refined their use of peer
instruction and the choice of discussion
questions (called “ConcepTests”), FCI
results continued to improve (p. 971).
In 1990, the last year of traditional
instruction, the FCI normalized gain was
approximately 0.23. In 1991, the gain
was 0.49, and that number increased
every year until 1997, when it had
reached 0.74. In 1998, they switched to
algebra-based introductory physics, but
FCI gains remained high at 0.65. In 1999,
the course reverted to the traditional lec-
Case Studies & Assessments
continued
The average normalized
gain doubled in the first
year of implementing
peer instruction, and
continued to grow
each year as teaching
methods were refined.
Classroom Response Systems
9
Teaching with Technology November 2007
ture format, and gains dropped again to
0.40. The following year, peer instruction
was implemented again and the gain rose
to 0.63 (p. 971).
In the peer instruction courses, tradi-
tional problem solving is de-emphasized
and students are required to learn and
practice these skills “primarily through
discussion sections and homework assign-
ments” (p. 971). Nonetheless, students in
PI classes fared better than traditionally
taught cohorts on the MBT, a widely
accepted assessment of physics problem-
solving skills. The average score on the
MBT increased “from 66% in 1990 with
traditional instruction to 72% in 1991
with the introduction of PI” (p. 971).
As with the FCI, student performance
continued to rise as instructors refined
the approach, reaching 79% in 1997. In
another comparative problem-solving
examination, the mean score increased
from 63% with traditional instruction
to 69% with peer instruction, and there
were also “fewer extremely low scores”
in the peer instruction group (p. 971).
In an analysis of all ConcepTest
responses over the course of a semester,
Crouch and Mazur found that, on average,
40% of students answered correctly both
before and after peer discussion. Some
32% of students answered incorrectly
at first but correctly after the discussion,
while 22% of students answered incor-
rectly twice. Only 6% answered correctly
first then changed to the incorrect answer
after discussion. They also found that
“no student gave the correct answer to
the ConcepTests prior to discussion more
than 80% of the time, indicating that
even the strongest students are challenged
by the ConcepTests” (p. 973).
The outcomes in the Department of
Physics at Harvard are certainly convincing
in terms of improved learning outcomes
with peer instruction, and several other
large-scale studies serve to corroborate
these findings. In a variant approach to
peer instruction, professors at Iowa State
University attempt to achieve “virtually
continuous instructor-student interaction
through a ‘fully interactive’ physics lecture”
(Meltzer and Manivannan, 2002, p. 639).
Again, the use of CRS is not critical to the
teaching approach, but serves to support
and facilitate the methods employed.
Comparing results from students
in the fully interactive ISU courses to
national results on the Conceptual Survey
in Electricity and Magnetism shows even
greater leaps in learning than those found
at Harvard. The normalized pre- and
post-test gains for interactive lectures was
“triple those found in the national survey,”
which presumably consists of a sample of
students primarily in traditional lecture
classes. Normalized gains for ISU interac-
tive courses were 0.68, compared to 0.22
in the national sample (p. 648).
And finally, Richard Hake conducted
an analysis of 6,000 students’ results
on two national physics assessments,
the Force Concept Inventory and the
Mechanics Baseline Test (1998). By gath-
ering and analyzing additional data on
the type of instruction offered in these
students’ courses, Hake found that the
14 traditionally taught courses had an
average normalized gain of 0.23±0.04.
By contrast, the 48 courses that used
interactive engagement methods like
those outlined in the previous two stud-
ies showed an average normalized gain of
0.48±0.14 (p. 71).
These studies confirm that teaching
methods that encourage active and mean-
ingful participation and engagement on
the part of the student can radically trans-
form the nature and scope of learning that
takes place. While CRS was not a central
component of any of these evaluations,
many instructors have found that the
use of CRS can simplify and streamline
information gathering and display in the
interactive lecture hall.
Case Studies & Assessments
continued
“No student gave the
correct answer to the
ConcepTests prior
to discussion more
than 80% of the time,
indicating that even
the strongest students
are challenged...”
Classroom Response Systems
10
Teaching with Technology November 2007
Classroom
response
systems can
bridge the
communication
gap between
instructor and
students, and
facilitate high-
engagement
lectures.
Conclusion
This report is intended to serve as an
overview of classroom response systems,
and a summary of findings from formal
evaluations of various implementation
scenarios.
These studies show that classroom
response systems can facilitate the pro-
cess of drawing out prior knowledge,
maintaining student attention, and
creating opportunities for meaningful
engagement. They can also assist instruc-
tors in assessing student comprehension
and developing classroom activities that
allow for the application of key concepts
to practical problems. As with other edu-
cational technologies, the most successful
References
Copeland HL, Stoller JK, Hewson MG, Longworth DL (1998) “Making the continuing medical
education lecture effective.”
Journal of Continuing Medical Education in the Health Professions,
Vol. 18, 227-234.
Crouch CH, Mazur E (2001) “Peer Instruction: Ten years of experience and results.”
American
Journal of Physics, Vol. 69 No. 9, 970–977. DOI= http://dx.doi.org/10.1119/1.1374249
[last access: 11.23.2007]
Greer L, Heaney PJ (2004) “Real-Time Analysis of Student Comprehension: An Assessment of
Electronic Student Response Technology in an Introductory Earth Science Course.”
Journal of
Geoscience Education, Vol. 52 No. 4, 345–351.
http://www.nagt.org/files/nagt/jge/abstracts/Greer_v52n4.pdf [last access: 11.23.2007]
Guthrie R, Carlin A (2004) “Waking the Dead: Using interactive technology to engage passive
listeners in the classroom.”
Proceedings of the Tenth Americas Conference on Information Systems,
New York NY, 1–8. http://www.mhhe.com/cps/docs/CPSWP_WakindDead082003.pdf
[last access: 11.23.2007]
Hall RH, Collier HL, Thomas ML, Hilgers MG (2005) “A Student Response System for Increasing
Engagement, Motivation, and Learning in High Enrollment Lectures.”
Proceedings of the Americas
Conference on Information Systems, 621–626.
http://lite.umr.edu/documents/hall_et_al_srs_amcis_proceedings.pdf [last access: 11.23.2007]
Hake R (1998) “Interactive-engagement versus traditional methods: A six-thousand-student survey
of mechanics test data for introductory physics courses.”
American Journal of Physics, Vol. 66 No. 1,
64–74. DOI= http://dx.doi.org/10.1119/1.18809 [last access: 11.23.2007]
Audience-paced and
peer instruction can
have a greater impact on
learning outcomes, but
also require a greater
degree of deviation
from the traditional
lecture approach.
implementations occur when instructors
set clear educational goals, and facilitate
the achievement of those goals through
thoughtful, engaging learning activities.
Each of the three levels of implemen-
tation discussed—classroom monitoring,
audience-paced instruction, and peer
instruction—can have a positive impact
on the learning experience and edu-
cational outcomes when thoughtfully
deployed. Audience-paced and peer
instruction show the most potential for
impact in terms of learning outcomes, but
also require a greater degree of deviation
from the traditional lecture approach.
Support
If you are an instructor at Carnegie
Mellon and are interested in discussing
the use of classroom response systems in
your class, please contact the:
Office of Technology for Education
ote@andrew.cmu.edu
412-268-5503
Our consultants will be happy to assist you
with any phase of planning, designing,
implementing, funding, and evaluating
the use of technology tools and strategies
for teaching.
Classroom Response Systems
11
Teaching with Technology November 2007
References (continued)
Judson E, Sawada D (2002) “Learning from past and present: Electronic response systems in college
lecture halls.”
Journal of Computers in Mathematics and Science Teaching, Vol. 21 No. 2, 167–181.
Meltzer DE, Manivannan K (2002) “Transforming the lecture-hall environment: The fully interactive
physics lecture.”
American Journal of Physics, Vol. 70 No. 6, 639–654.
DOI= http://dx.doi.org/10.1119/1.1463739 [last access: 11.23.2007]
Miller RG, Ashar BH, Getz KJ (2003) “Evaluation of an audience response system for the continuing
education of health professionals.”
Journal of Continuing Education in the Health Professions,
Vol. 23, 109–115. http://www.cbil.vcu.edu/Resources/ARSMiller.pdf [last access: 11.23.2007]
Poulis J, Massen C, Robens E, Gilbert M (1997) “Physics lecturing with audience paced feedback.”
American Journal of Physics, Vol. 66 No. 5, 439–441. DOI= http://dx.doi.org/10.1119/1.18883
[last access: 11.23.2007]
Conclusion
continued
About the Series
The purpose of the
Teaching With Technology White Paper series is to provide Carnegie Mellon
faculty and staff access to high-quality, research-based information with regard to a given classroom
technology. These papers offer a general overview of the technology topic, summarize findings from
available assessments and evaluations, and give direction toward further reading and online resources.
This series does not introduce original research findings from technology assessments or evaluations
conducted at the Office of Technology for Education and/or Carnegie Mellon University. The papers
serve as literature reviews, intended to provide scholarly integration and synthesis of the most sound
and comprehensive studies documented at the time of publication.
This work is licensed under:
Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
To view a copy of this license, visit: http://creativecommons.org/licenses/by-nc-nd/3.0/us/
write to: Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
Classroom Response Systems
12
Teaching with Technology November 2007
Available Products
TurningPoint, from Turning Technologies, is one of the most versatile
solutions on the market. Their software integrates completely
into Microsoft PowerPoint, allowing professors to author, deliver,
assess, and report from within PowerPoint. TurningPoint
offers infrared and radio frequency versions of their student
transmitters, and simple USB-based receivers. Virtual Keypad
(or vPad) is available for wireless classrooms as a software
alternative to transmitters and receivers.
InterWrite also offers both infrared and radio
frequency transmitters. Unlike most transmitters on
the market, both the IR and RF transmitters offer high
and low “confidence level” keys, allowing students to
indicate how confident they are in their answers. The RF
transmitter screen can display 16 characters—more text
on screen at once than most other systems. This allows for
a self-paced testing functionality, where students can scroll
through a series of questions and answer
at their own pace.
Appendix One
The most predominant sales model for classroom response systems is for a single
company to provide all necessary hardware and software for the system. (The most
common exception is when the product is a software-only solution, designed for use
on existing wi-fi or wired networks. Such solutions are discussed in more detail in
the next section.)
In many cases, software and receivers are provided at little or no cost, with most
profit resulting from the sales of student transmitters. Many universities choose to
pass along the full or partial cost of transmitters to the students, especially where
systems are widely adopted and students can expect to use a single transmitter in
multiple classes.
eInstruction offers a basic, inexpensive classroom response system.
Although the software was designed to be used easily with presentation
software like PowerPoint, there is currently no direct integration
between these applications. Similarly, while most systems integrate
fairly directly with Blackboard, file manipulation is required to use
eInstruction PRS data in Blackboard’s gradebooks. The transmitters
are fairly inexpensive to purchase, but require the purchase of a new
activation code each semester. Activation currently costs $12 to $18.
Classroom Response Systems
13
Teaching with Technology November 2007
H-ITT boasts the lowest system cost on the market. It offers
only infrared transmitters, but its receivers have a wider pick-up
range than most other infrared systems (a 180-degree cone,
compared to 90 degrees on other systems). H-ITT comes with
two separate software packages: one is used in class to collect
and view responses, and the other is used to manage and grade
responses over the course of the semester. Each remote costs
about $25, and there are no activation fees. The receiver costs about
$200, and one receiver must be purchased for every 50 remotes.
Available Products
Appendix One
, continued
Qwizdom places heavy emphasis on the physical design of their
transmitters. The large text display on both instructor and
student remotes allows for one-to-one communication, a
feature not supported on any other system reviewed here.
Receivers and software are free, but the remotes cost
about $100 apiece. The price is high compared to other
transmitters, but they are intended to be purchased once
and used for the duration of a student’s college career.
TI-Navigator, from Texas Instruments, uses radio-frequency hubs to
connect student’s calculators to the teacher’s PC. The system
seems to focus most heavily on mathematics applications
for obvious reasons, but it is unclear as to whether the
calculators can be used for more general questions and
polling. The system is fairly costly, pricing at around $4000
(not including calculators) for a 32-student classroom. Its
advantages over other classroom response systems are specific
to math applications.
Many classroom response systems are being developed solely as software applications
that are designed to run over Wi-Fi on existing portable devices, like
laptops and Pocket PCs. Numina II is a browser-based application
developed at the University of North Carolina, Wilmington.
Class in Hand is software for the Pocket PC that was developed at
Wake Forest University. Both of these applications are currently
free to use. For those who are more comfortable with the
accountability and support of a retail product,
ETS Discourse is the commercial equivalent.
Classroom Response Systems
14
Teaching with Technology November 2007
System
Com
parison
Appendix Two
System
Advantages
Disadvantages
Infrared (IR) systems basically use the
same line-of-sight technology that is
used in household television remotes.
They have the lowest overall
equipment cost.
There are no interference issues from
classroom to classroom, as signals do
not go beyond the walls of the room.
Because the clickers must be aimed
directly at the receivers in order to
work (and thus have high visibility in
the classroom), they also reduce the
likelihood that students will bring
in each other’s transmitters when
responses are used for attendance
or participation grades.
In radio frequency (RF) systems, the
receiver does not have to be placed
in line-of-sight of students, allowing
for increased portability in hardware
solutions.
Signal reception is more reliable and has
a longer range.
RF systems also allow for two-way
communication, so clickers can
confirm when student’s response
has been received.
Wi-Fi systems use a web-based interface
for student interaction. These systems
allow for text entry and open-ended
responses.
Students can use a wide variety of
Wi-Fi devices.
Uses the existing campus wireless
infrastructure.
Most IR systems often offer only one-way
communication, which does not allow for
confirmation when student’s response
has been received.
They also require the placement of
receivers in line-of-sight of students,
which often means permanent or semi-
permanent installation.
Each receiver can only support between
40 and 80 transmitters (depending on
manufacturer), so multiple receivers are
necessary for larger classes.
In very large classes, signal reception can
be unreliable and have a shorter range.
Clicker administration and management
can also be expensive.
Low visibility might make it easier for
students to cheat the system by bringing
in each other’s transmitters when
responses are used for attendance or
participation grades.
RF clickers are more expensive than IR.
There is a higher likelihood of interference
issues as RF clickers can operate on the
same frequencies as Wi-Fi and other RF
devices.
Clicker administration and management
can be expensive.
Requires students to have a Wi-Fi
computing device.
Fewer choices currently available in
the marketplace.
Infrared
Radio Frequency
Wi-Fi
Infrared, radio frequency, and Wi-Fi systems each have advantages and disadvantages,
and deciding which system is best depends heavily upon the needs and priorities
for a given context.
Adapted from the University of Minnesota Office of Classroom Management’s “Student Response Systems Overview”
http://www.classroom.umn.edu/notes/support_srs.asp
