Clickers' Use in Class

I have been using the clickers to see how well students can identify coins and their value. It has been very successful and the children look forward to using them! Students have been openly discussing if they knew the answers or not.  They help the person next to them with (technical things) if their number isn't highlighted. Some challenges: Number 23 is occasionally showing though no one has that clicker. We haven't figured out which existing clicker has the connection to it.