We can go through the year together as we're starting Bigger in July. I got my order last week and everything looks great. I absolutely love the One Small Square books.
Anxious for a reply to this also. I'm thinking of using Bigger for my 9 year old who will be in 4th grade. After reading/comparing the writing in Bigger and Preparing, I'm thinking Bigger would be better fit so he could work up to Preparing.