Make matches of kilograms that combine to create a tonne in this memory-style card game.   Students will shuffle the kilogram cards and create a play area. They will take turns to flip over cards to create a matching pair that add up to make one tonne.   They then score a point in the form of a tonne card. The first to score six points is the winner.   There are four coloured game boards for the students to keep score as well as a recording sheet that prints two per page.   Print the game boards and cards on thick cards to increase durability.