1) homeschool
2) distance learning
3) ask for a grade skip (It's worth trying)
4) ask for him to be tested in every subject and placed in various grades throughout the day at his various levels.
It's always personality plus classroom fit. Some kids can handle a poor fit classroom without acting out - some can't. Your is telling you that he's one of the ones who can't. Will he also turn out to have some ADHD? It's impossible to tell right now. Right now the keep is that he needs a good fit classroom.
Set up a meeting with the teacher, then up the chain of command. It isn't always possible for a teacher to meet the needs of every kid who happens to be 5 years old, so you may have to try him in other classrooms. Usually teachers can differentiation up and down 3 years worth.
Best Wishes, I know this isn't fun!
Grinity
