Instant Polling on Cell Phones
This would be a good way to explain the difference between scientific and non-scientific polling. It also allows the kids to do what they most want to do in class - get on their cell phones! Set up a free account and then you can have your students send in their votes. Our new blogger Jason told me about this site and he had his kids text 5 people to do the poll and, not surprisingly the people responded almost instantly so his poll was much bigger thant he class he was working with at the time.