A whole fully differentiated lesson which introduces students to simple proportional problems such as "3 cakes cost £4.50, how much will 5 cost?" The powerpoint takes students through the unitary method. The fully differentiated resource (1 star, 2 star, 3 star) can be printed and students can write on the sheet. The resource contains a notes section which, when stuck in their books, gives them a reference. The students select which level of work they wish to work on. Answers are not supplied.