Before buying a single subject or subject combo, look at the price of a full grade. For example, language arts & Bible in 2nd grade would be $535 for books and lessons. For $959, you could get books and lessons for EVERY subject—language arts, Bible, arithmetic, science, history, and art.
That’s $424 more for 3 more subjects + art—the best value. (The difference comes out to only $2.49 more a day.)*
*based on 170 school days’ worth of lessons