How do you keep a cockatiel from boredom while at school?

leave the radio on at low volume, keep the cage by the window so they can look out, everyday, change the placement of the toys in the cage, leave random things that capture his interest near his cage.

Just becareful to not put things that scare your bird near him or his cage. Itll give him lots of stress and could start him feather plucking. If hes extremly bored, he can feather pluck as well.

Try your best