We have wrist bands that they all wear on their belts. But honestly we used signals from the sidelines. We had up to 18-20 formations but they were pretty easy to call. We really did not script either. It was more of a feel for the game. As an ex defensive coach, we relied on the feel for the game to make defensive calls so it has really helped on the offensive side. We had a game plan of what plays we thought would work and during the week we ran them a lot, during team, etc... Monday's we put on any new plays we might have. Then we would have a time during the practice on tuesday, wednesday and thursday where we went up and down the field running plays as fast as possible rotating in players just like game situation and we would play call according to ball position, etc... We did have to create an indicator for the play signals as one team was able to pick up our signals early in the year. They had an extra coach that he watched us as we signaled plays in and figured out some of the play calls. If you have enough coaches that are there enough to pick up the signal calls you could have two or three coaches making the signals and only one set being the real call but not many folks on our level have that many coaches. I know we don't, thus the indicator. I hope this makes sense, bottom line is repetition is the key for us. Rotating kids in and communicating when they come in the game helps. It also allows us as play callers to understand the personnel. Take care, TR