J.D. Salinger’s “Catcher in the Rye” and Harper Lee’s “To Kill a Mockingbird,” won’t be a part of the new school curriculum that will affect 46 out of 50 states, because it will now be compulsory for at least 70 percent of books studied to be non-fiction, approved by the Common Core State Standards in 2014.
Suggested non-fiction texts include Recommended Levels of Insulation by the the US Environmental Protection Agency, and the Invasive Plant Inventory, by California’s Invasive Plant Council.
The new educational standards have the backing of the influential National Governors’ Association and the Council of Chief State School Officers, and are being part-funded by a grant from the Bill & Melinda Gates Foundation. Source