Out of personal preference, I like the NASO evaluation form (
http://www.naso.org/modelevalform/im...elevalform.pdf). I've done a little bit of evaluations for younger officials. I ALWAYS focus on mechanics and forget about the actual calls being made. I don't worry about if it was the right or wrong call (most of the time). You are not going to teach rules, so don't worry about it. Just focus on positioning, game management, and looking sharp.
Just my two cents
-Josh