Edugains has long been a great resource for math instruction. They have recently beefed that up even more with some great guidance for teachers to aid in their planning of math. They have published a scope and sequence for the Ontario Mathematics Curriculum with suggested timelines for each topic. Below is a link to the very general grade 1 – 8 sequence. More detailed scope and sequences that are specific to divisions can be found in the corresponding tabs on my blog. For example, click on the Primary resources to find the scope and sequence for grades 1 to 3.