I follow the order of this PowerPoint when teaching basic math facts to my primary grade students: zero strategies, count on / count back, names of five, five strategies, using tens (including ten strategies, names of ten, near tens, nine strategies, eight strategies), and using doubles (including doubles, near doubles, middle number). Each strategy is colour coded. I created strategy flashcards (can be printed off from my store) that matched the colour. There is also a personal strategies ch