Ben's marks shoot up, but his teacher - the nasty Beardy McCreedy - is suspicious, and bets Ben's dad that Ben can't pass a maths test without cheating. Ben is sure he is doomed, but with Stinky's help - and some disgusting maths props - maybe he can prove his nasty teacher wrong .

Ben's marks shoot up, but his teacher - the nasty Beardy McCreedy - is suspicious, and bets Ben's dad that Ben can't pass a maths test without cheating. Ben is sure he is doomed, but with Stinky's help - and some disgusting maths props - maybe he can prove his nasty teacher wrong .