Also Known As:  Classroom Communication Systems, Personal Response Systems, Electronic Response Systems, Audience Response Systems, etc.

For this web site, the term Classroom Response Systems or CRS will be used.

Obviously, there are many CRS choices available today. The aim of this site is to provide comparative information to the educator. A click on any of the above keypads will take you to the company's web site.  As one can see, the keypad itself is not much different from company to company.  Some use IR (infrared) technology, some use RF (radio frequency).  There are pros and cons to both, but the hardware is just the collection device.  Its the software that enables current PowerPoint lectures to become interactive and plot student responses to any variety of instructor questions in real time.