Here are a few websites to check out:
www.act.org
http://www.powerscore.com/sat/help/content_practice_tests.cfm
http://blog.prepscholar.com/complete-official-act-practice-tests-free-links
www.act.org
http://www.powerscore.com/sat/help/content_practice_tests.cfm
http://blog.prepscholar.com/complete-official-act-practice-tests-free-links