Hmmm... I do believe a calorie is a calorie. Just an opinion. IIFYM works if you actually follow the macros and dont eat like **** constantly. IIFYM is there so you can incorporate SOME cheat foods,...
your coach is dumb... If you dont feel like you do enough at school, go to a gym. Simple as that. I personally dont like full body, but thats just me. Ever consider doing a split?
I wouldn't say that every day is good for arms, to avoid injury, but everyone's recovery time is different, so the times to hit a muscle to "over-train" them is different. I know people who can hit...