I highly recommend any parent, grandparent or guardian do your best to purchase I-Ready Books on ALL grade levels if you can. I found the material the children are expected to learn in elementary school is what I learned, (50+ years ago), in middle school and some even in high school! I'm sure the curriculum will be changing but at least you'll have a general idea of what's expected of them. *It is Compelling in that it's content is indeed overwhelming!