Can you source that?
He was suspended for vandalism twice and once for having the 'empty' marijuana baggie and the marijuana pipe.
One of the vandalism suspensions involved the school officials looking in his backpack for the object(s) he used to write "WTF" on a locker or lockers, and they found the women's jewelry and the flathead screwdriver. Martin claimed the jewelry (thirteen or fourteen women's rings and earrings, and a watch) weren't his and belonged to a friend, but it's reported he wouldn't name the friend.
As far a I can tell from research, there's been no reported record of him being suspended for assaulting a bus driver, as far as I've been able to determine.
If you have a link to a source discussing that suspension, then please share it with us.
I'm not a Martin apologist. I just try and source things. Here, the story about the bus driver appears to have been generated solely from the single February 21 tweet.
It was one of his 3 suspensions. They worded it down to being in an unauthorized area, aka the front of the bus. IIRC.