ACT PREP websites
www.testpreview.com/act_practice.htm
This site has self- assessment modules as well as ACT Practice tests!
www.studyguidezone.com/pdfs/actteststudyguide.pdf
This site has an excellent study guide that will break down each test!
http://testprep.sparknotes.com/testcenter/act/
You will have to create an username and password for this site, but it is free and it will track your progress for you on your practice tests!