Ontario Provincial Curriculum Guidelines
This one's great and it's cheap! You can download it off of the Ontario Ministry of Education website or you can request a hard copy from them. It lets you know where your Ontario child is expected to be in their educational journey. I use mine as a check list as we work through everything we do.

I use different material to complete the requirements, but there are more and more publishers who are working to meet those guidelines. S&S publishers and Check and Double Check already do. S&S is available at many different retailers, including Staples Business Depot. Check and Double Check is made specifically for Scholar's Choice and is only available through them.