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This module addresses frequently asked questions about the use of clickers.

1. how much time should i give students to answer a clicker question?

This depends greatly on the type and difficulty of the question: in most cases, it takes students between 30 seconds and a minute to process a question and be ready to answer individually or discuss. It then takes a few (1-4) minutes for productive discussion. The level of student discussion and the number of votes in is a good guide as to when to move on. When ~3/4 of the students have responded it is often a good time to announce end is near, then sound warning gong, count down out loud, or turn lights out to indicate that discussion should stop and students should “click in”. Instructors who decide when to end the polling based on the discussion around them often wait too long. While discussion around them will continue to focus on the question, in the rest of the room discussion has often moved on to non-class-related topics, making it harder to pull students back to class material. It is useful to poll the class after several weeks to see if they feel you are giving them too little or too much time.

Using the timer in the countdown mode available with most clicker system software is usually distracting to students and instructors and can limit discussion. It is better to set the timer to the maximum count down duration or in count up mode, and then just stop the question manually when you think it appropriate.

2. how should clicker questions be graded?

Most instructors make clicker questions a portion of the total course grade; between a few % and 15% is common, although a wide variety of approaches are used. The two most common grading schemes used are giving equal credit for correct and incorrect responses (participation only), and giving greater credit for correct than incorrect responses. Some pros and cons to these grading approaches are listed below. Another approach is to give participation credit only most of the time, but occasionally grade individual questions for correct responses. There is no consensus view recommended by research or convention, but our anecdotal observations lead us to lean towards this latter grading policy of always giving credit for participation and occasionally giving additional reward for the correct answer.

Giving credit only for correct responses is not recommended as it distorts the discussion and student response strategies in undesirable directions, and it limits the type of question that can be asked. For example, you cannot ask questions with multiple justifiable answers; yet such questions can generate the most educationally productive discussions. Similarly, not having clicker questions count for any credit is not recommended. S. Freeman et al, “Prescribed Active Learning Increases Performance in Introductory Biology,” CBE Life Sci Educ. 6(2), pp. 132-9 (2007). This sends the message that questions and answers are not important, and students will not take them seriously.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Clicker resource guide. OpenStax CNX. Apr 11, 2010 Download for free at http://cnx.org/content/col10724/1.2
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