Do not be confused with the television series episode Back to School, Mr. Bean.
Back to School is the 17th episode of season 4 in the animated series.
When there's no milk for his tea and for teddy, Mr. Bean goes to buy milk. However, instead of parking near the grocery store because of the traffic warden, he parks his car at a nearby school. He is unexpectedly brought in by the principal who mistakes Mr. Bean as the new teacher and is forced to teach a group of juvenile delinquents, but he actually may be a better teacher than he thought.