Too-Tall Grizzly has a master plan for the new substitute teacher, and trouble is brewing!
When Brother Bear's teacher is away, all of the cubs in class decide that it's more fun to spend the day playing pranks on the substitute teacher than doing work! But when the pranks get to be more and more troublesome, Brother finds himself in a sticky situation.
What starts as harmless giggles quickly turns into Too-Tall Grizzly's relentless Operation Substitute. With paper airplanes buzzing through the air and pencils clattering across the floor, even a giant bullfrog ends up loose in the classroom.
Things get even wilder when the gang rigs a bucket of ice water above the ceiling tiles for the morning video lesson. Will Brother be able to stop the big prank and save the substitute before it's too late?