Homeschool Share is an “on-line cooperative effort of several homeschooling moms to provide free but quality literature-based unit studies and resources.”
The unit studies are categorized by primary, lower and upper elementary levels. All of the units are tied to literature such as The Ox Cart Man, Miss Hickory, or Sarah, Plain and Tall. If you are looking for resources to go along with a specific book, you can browse the author index or book title index.
Check out their FAQs for answers on how best to use the site, how to get started with literature-based units, and information on lapbooking and notebooking.