Oooo, a "thesis"! When I was working on my Masters I wanted to title mine: "Why Johnny can't drum" it was too sarcastic but the jist of it was this: why do school guidance counslers, administration and parents think that having a "special needs" student play drums in the school band is easy for them.
Actually, believe it or not, it's hard for them because playing percussion instruments requires a lot of higher thinking skills to include maintaining a steady tempo, coordination, detailed attention to time and space (rests and such) and critical listening all of which are not common for most special needs student. A clarinet and or saxophone are much better becaue there is NO vaugeness in thier fingerings like there is in playing a percussion part. Thumb and first finger on a clarinet will always be an "E", no guessing whatsoever. Also, a clarinet part for beginners is continous playing unlike percussion who have to deal with lots of resting and counting almost immediately in their studies.
In fact, at my school only high academic achievers are encouraged to sign up for percussion and they are all given my percussion speech about how they're not there to be the next ROCK-STAR drum set player. Of course I allow anyone to sign-up for drums but in most cases percussion students learn that it's much harder to play the drums than other instruments,.....real soon.