Lesson 4 In this lesson, children will calculate ratios in a range of ways. Bar models and other representations will support their understanding. There is a teaching presentation and three levels of worksheet (working towards, expected and greater depth) with a range of fluency, reasoning and problem solving questions. Differentiation: There are three levels of differentiation in this pack: ‘working towards,’ ‘expected’ and ‘greater depth’. Level of this Pack: Age: 11-12 Australia: Grade 6...