re: Do Clickers Beat PCs For Testing Students?
Yes, Internet connection is required. Through the tight knit co-development in Leadership Public Schools in Oakland, Calif they used clickers first and it bumped the growth of the students up from about 1.2 years of growth per school year to about 1.5 per year. Now, with the 2nd iteration of ExitTicket, those numbers are up to 2.5 years (1.7 with the first iteration) of growth per school year.
Not only are you polling for understanding, you can allow students to take exams and take checks for understanding home with them (ie, answers from the textbook chapter reviews) and they are not only automatically graded for the teacher, but teachers can monitor them real-time as they are being completed.
All of this is tracked over time to give teachers a better understanding of the concepts the student has mastered. Wifi/Mobile Internet dependency is a great trade off for such a rich learning environment.
Clickers to me are a digital version of raising your hand... ExitTicket is virtually reducing the class size and allowing for immediate intervention and reteaching on a per student level, and celebrates their growth, not just the grade they receive on an exam (which I understand this story was about, just the exam portion).