Ten Things Debaters Should Know

http://www.csun.edu/~dgw61315/aboutecon.html

Macro - Micro Economics Book

http://www.web-books.com/eLibrary/Category/Social.htm

Audio Portal

http://workforall.net/

Free software and computer simulation

http://www.economicswebinstitute.org/software.htm

Online

http://wikieducator.org/Economics_Textbooks_Free_and_Online
http://www.economicsonline.co.uk/

Free

http://www.openculture.com/economics_free_courses
https://www.fraserinstitute.org/economic-freedom

https://www.google.com/search?q=Economic+Freedom