I made this to email parents how we teach all 4 operations in my primary school. It includes visual examples of how addition, subtraction, multiplication and division are taught. There are 14 pages and these are the different stages I include along with examples of mental strategies pupils will need to learn.
Addition = Stage 1 – Drawing objects in a group, Stage 2 – Marked number line or beads strings, Stage 3 – Unmarked number line, Stage 4 - Partitioning, Stage 5 – Expanded method in column