Below are a couple web sites related to Open Education Resources where you can download materials for FREE and use for FREE on your own or with/by students related to:

Textbooks
Training Materials
Activities & Labs
Full Course
to name a few.

All subject areas, grade levels, and media formats are covered along with relationships to the Common Core, Pre-College Courses, Open Textbooks, Classroom Management, and Career and Technical Education.

This would provide those online opportunities for students that need MORE at any level of learning.

Listed are a couple examples.
http://www.ck12.org/flexbook/book/6204
http://www.jamesbrennan.org/algebra/
http://www.exploratorium.edu/cooking/index.html
http://constitutioncenter.org/lincoln/
http://learning.blogs.nytimes.com/2006/10/30/a-tale-of-two-wars/
http://www.trumanlibrary.org/1948.htm

Thanks for taking a look, Brandon.

http://www.oercommons.org/
http://oerconsortium.org/