This lesson includes a settler to get students started as soon as they enter the room. A starter checking understanding of factors and multiple. It then moves onto Highest Common Factor HCF and Lowest Common Multiple LCM, including a clear example and steps to success that they can put into their books. There are examples with differentiated questions and answers. There is then a card sort activity for anyone who needs more practice. Ending with exam style challenge questions in the plenary. All the slides are animated so that you can just click and it will go through everything, answers appear one at a time so you can get answers from specific students. It is planned with an hour and 20 min lesson in mind but you can remove parts of the activities if you need it shorter.