I do a variety of games with my students in grades 5-8 with pedometers. First, we do a lesson on how to use them properly and then we play a quick game like Pac-man. Then I have them find their heart rate and target heart rates with them doing various movement activities such as jumping rope etc. They then have to record their heart rate. After they have learned how to use them I have them measure their distance and convert them to miles we try to estimate distace in steps to and from various locations. I make it a competition to see who estimated the closest get to pick an extra game the last 5-10 minutes of class. Kids get into trying to find out who can guess the closest distance. Sometimes I put them in groups and make it similiar to a scavenger hunt. First group to finish get a prize or something fun.