What to address first...

I just picked my kids up from school. WeeMan's teacher has been having a hard time with him, and we've been talking to him at home, but it's not working. What she's dealing with is:

•He's refusing to take his tests. When he is taking them, he's not even trying to do the work, so he fails his tests.
•He tattles on the other kids in the class, lying about what they're doing. Obvious lies. The kids don't want to play with him anymore, which is sad. He was friends with everyone last year.
•He's cursing and using potty words to get a reaction from the other kids.
•He's pulling his pants down and showing his butt.
•He's talking over his teacher when she tries to read to the class. When she lets him read, he changes the story to use potty words.
•He refuses to follow instruction when he's in in-school therapy.
•When his teacher tries to impose consequences on him, he throws himself on the floor and cries.

I hate this. I really want him to go to a regular school. We've gotten so much pressure to send him to a special school. I don't want to have to cave because he can't behave himself.