You just did exactly what is meant by forget the IQ and deal with the behavior.

- Realized the school was a source of anxiety.
- Placed your child in a more suitable environment to deal with the anxiety.
- Most importantly, solved the anxiety problems quickly, so you can get on to the education. Dealing with the behavior is suppose to be a short term goal.

Psychologists make these simple rules for parents, teachers and psychologists who do not have a natural ability to figure it out themselves.

I think you might just have a natural talent for making the right choices. So the starting your own school idea is not a bad idea.