A complete Year 6 maths lesson resource exploring how different combinations of parts can be equivalent to the same whole. Includes fluency, reasoning, problem solving, teacher guidance and answers. This ready-to-use resource develops pupils’ understanding of equivalence through a carefully structured sequence of questions and representations. Pupils begin by interpreting visual part-whole structures and writing equivalent equations before progressing to decimal compensation, measures, related equations and generalisation. The final section challenges pupils to explain and prove why a whole can remain unchanged when its component parts change. Included in this resource: Developing, deepening and mastering sections Fluency practice Reasoning questions Problem-solving activities Visual representations Decimal and measure applications Greater-depth/generalisation opportunities Discussion prompts Teacher guidance National Curriculum links Complete teacher answers