End of unit review -A concentric circle discussion:
Students get in to pairs A/B, A/B etc
Form two circles - A's on the outside and B's on the inside
When the question flashes up on the bord, discuss with your partner
When the timer bell rings, B's move to the next A in a clockwise direction and a new question appears on the board.
Continue
Feedback will be at the end of the activity.