The Linear Series (Books 1-20) cover ALL learning intentions in the curriculum. They start at Year 0 (Book 1) and continue to Year 6 (Stage 6).
The Subject Area books (addition and subtraction, multiplication and fractions) are collections of the material taken from the Linear Series (Books 1-20). The Subject Area books cover only learning intentions that are relevant to that book.
If you don't want your child using a device, that's okay. Personally, I think the apps make a good addition to the variation of activities offered in the books, and I've done my best to match apps as closely to the learning intentions as possible. Click the button below for the apps list across all books.