The list author says: "I decided to make this list because I wanted to make a list of the materials needed in different programs of study. I decided to make a list of all the books available in Sonlight's P4/5 program. Some prices are better than sonlight's, so this list may be helpful if you're searching for the best prices.
If I was unable to find specific materials, I will mention them. I will also choose, in my thinking, good substitutes if I am unable to find exact material. You will need to get the P4/5 Instructor's Guide from Sonlight if that is the curriculum you decide to use."
You will also want to get "Earlybird Kindergarten Mathematics Textbook B (Standards Edition)", "Earlybird Kindergarten Mathematics: Activity Book A & B (Standards Edition)" These can be gotten from Amazon, I just don't have room to include them."