This is suitable for lower ability students although can be differentiated for core classes. Lesson begins discussing how to multiply larger numbers and partitioning of numbers. Learners gain practice of grid method (word doc.). Then in pairs learners answer colored questions, one at a time. Questions are tiered and learners must show full working out (whiteboards are good for this). When they gain a correct answer with clear working they're awarded points. Winners awarded a prize. This will take a whole lesson. Please leave feedback.