This is a whole lesson on teaching factors and Highest Common Factors (HCF). Updated, 14 slides.
This is aimed primarily at KS3, for pupils that this is the first introduction to factors and finding the highest common factors. It comes as a four-part topic, with the last part on prime factor decomposition, which goes into more advanced questions on HCF. This is available as a bundle/series at a reduced price (approx 30%) and I highly recommend it as a sequence of lessons.
This lesson contains a starter, lesson objectives, keywords, examples, using MWB's, questions with answers and plenary. It also comes with an additional worksheet I had if you needed further practice or often I set it for HWK, which feeds well into the third lesson on prime numbers.
NOTE: Feel free to browse my shop for more excellent free and premium resources and as always please rate and feedback, thank you.