Books are for More Than Reading

I made up a new/old fashioned way to teach self control:

Books on the heads at their seats.  If you are under control, you may remove your book.  If you feel yourself getting out of control, replace the book.  If I have to remind you to be in control, you have to look at the clock and keep the book on for one minute.  Each loss of control adds a minute (up to 5).

All I've done so far is let the kids practice with books, they seem to like it...we'll seeeee.