Some of this I addressed in one of your other threads.
"10 day suspension tracking" thread is in the Sp Ed Archives. This is a link. http://www.conductdisorders.com/community/threads/10-day-suspension-tracking-letter-of-clarification.667/
We sometimes assume that teachers automatically know how to approach each student. That's not true, and they get frustrated dealing with-reoccuring problems just like we do.
Based on what you've written, he is sometimes being "triggered" by a teacher. Behavior modifications may need to be written into the IEP. This type information and how to approach the problem should be written in the "Recommendations" section of the evaluation report(s).
