…by a cruel dictating teacher. Saves the day, wakes up from comatose state.

Tweenage boy steals (possibly tomatoes) from store, knocked out while trying to escape. Rest of the movie is in a school with this fascist, cruel teacher/principal, and the boy saves the day/students. Wakes up to his normal life, feels bad about stealing.
Roughy remember a scene where his two helper buddies are stuck in this elevator or something, and he communicates with them on a walkie talkie with a screen.
Watched 2000-2007, colour, on a tv, in english, think it was meant for children