How do I know which workbook to buy?

Our workbooks correspond with the grade levels in Ontario.  For example, Workbook 4 (Parts 1 and 2) is for students in Grade 4.  If your child is working at or a little behind grade level, we suggest that you purchase the corresponding workbooks, as they do include review material that goes back 1-2 years. If your child is behind 2 or more years, we recommend purchasing the workbooks 1 or 2 levels below the grade they are in.