Channing Tatum felt "messed with" at school because he wasn't "a very smart person".
The 34-year-old actor - who has suffered from attention deficit disorder (ADHD) and dyslexia - has hit out at the education system in the US for not helping him enough and simply "lumping" him into classes with Down Syndrome and autism suffers.
He said: "I have never considered myself a very smart person, for a lot of reasons. Not having early success on that one path messes with you.
"You get lumped in classes with kids with autism and Down Syndrome, and you look around and say, 'OK, so this is where I'm at.'
"Or you get put in the typical classes and you say, 'All right, I'm obviously not like these kids either.'