One more thing-- if it's a frustration tolerance issue, they should be positively reinforcing every single time he manages frustration without flipping out. That's how you'll see a change the fastest.
Of course, it would also be helpful to know the antecedents of the blowups. What situations cause them? Are there ways of acclimating him to those situations (we are big on role play) to make them less of a big deal for him?
DS hated writing in his planner; it made him anxious. We practiced it at home a few times; he just had to copy whatever I wrote into the planner. The teachers are also aware and positively reinforcing when he does it correctly. We saw much better success after that: he knows what he's to do, he's practiced, and he knows there's a payoff for success. You can teach almost any behavior this way...
DeeDee
