Ratio & Proportion Investigator KS3 is a five-mission Year 8 activity book mapped to the DfE National Curriculum for Key Stage 3 ratio and proportion. Learners simplify ratios to their lowest terms, divide a quantity in a given ratio, solve direct proportion problems with the unitary method, work with scale factors, scale drawings and map scales, and compare unit prices to find the best buy. Every question is auto-marked on screen, or the whole book can be printed with a full answer key. Includes teacher, parent and pupil notes and is fully SEND-friendly with high-contrast and large-text modes.