Reading about MB in mostly sympathetic articles, I think MB may have been more passive-aggressive with authority figures than confrontational, i.e. he ignored them. That's what he appeared to do in the store video until the little guy tried to prevent his leaving, and that seems to be what he did initially when OW told him to leave the middle of the street. Can't imagine him meekly turning to p. 132 in his math textbook at school, but can fully imagine him ignoring the teacher and laying his head down on his desk or "playing"/texting with a device during class, both of which would get him into trouble at most schools. I think by the time MB arrived at Normandy HS sometime in his junior year, having previously attended 3 other area high schools, his disciplinary record followed him and he was put on the "special diploma" track that DJ used, and was no longer in regular classes, but in a tightly controlled "independent study" situation with minimal contact with students or teachers.