The biggest problem I have seen with AAU (at every level except the very elite levels-EYBL National Circuit teams) is that kids are not being taught to defend. The defense in AAU is atrocious. There is absolutely zero team defense. AAU is all about offense and that is fine to an extent but, because the defense is so bad kids develop a false sense of confidence about what they can and cannot do. Then, when they get into the school season where team defense is a major point of emphasis I see kids get frustrated because their one on one moves don't work against great help defense and they have no clue how to locate the proper kick outs and dishes. I had a friend of mine who has a freshman on his varsity this year. In a film session he asked the kid why he wasn't on help side when the ball was away. The kid responded: "Because in AAU my coach told me to just follow my man around, so it's hard for me to remember to be on help side when the ball is away." This kid played for an AAU branch that is regarded highly in the Greater Houston area. Seriously, how many AAU practices include instruction on proper help side defense, seeing man and ball, choosing ball over man if you have to make that choice, switching pick and rolls, hedging pick and rolls, defending cutters, helping the helper, trapping pick and rolls and the list goes on. The funny thing is, go ask a college coach what the number one thing they want to know about a kid is and they will tell you they want to know if he can defend the position he will play. If the AAU guys really wanted to help these kids out they would be teaching much more defense and the concepts listed above.