Imagine you've just had a class do an exercise with a number of questions and you want to turn marking it into something much more exciting than asking who has the answer to question 1. If your class works well in competitive teams, and the number of questions can be written in a rectangle or square (9,12,16 are good), use the concept of noughts and crosses.

Write the question numbers in a grid on the board and give each team a colour or symbol. Teams take it in turns to choose a question to answer and if they are right, they 'win' that number. To win the game, teams need to try to get three numbers in a row.

Variations include having more than two teams and only finishing when all of the questions are answered, with each team trying to get more lines of three numbers than the other team(s).