If one does not understand, the team members help. Teacher calls time. Students stop discussing. Teacher spins student spinner. Students with that number stand without talking.
Teacher spins team spinner and person standing in team gives their answer.
If students standing in other teams agree with answer, they sit. If students standing in other teams disagree with answer, they stay standing. Teacher gives another problem and continue steps 1 -10. If a team talks while anyone is standing, that team is disqualified. Constantly walk around the room to ensure that everyone is working.