General ACT Prep (All Subjects)
- http://www.actstudent.org
- http://www.number2.com/
- http://www.actexampracticetests.com/
- http://www.cliffsnotes.com/test-prep/college-entrance-exam
English
- http://grammar.ccc.commnet.edu/GRAMMAR/
- http://www.grammarbook.com/
- http://www.eslcafe.com/quiz/#grammar
- http://www.dailygrammar.com/archive.html
- http://www.grammaruntied.com/blog/?page_id=1344
- http://www.englishpage.com/
- http://grammar.about.com/
- https://owl.english.purdue.edu/exercises/
Math
- http://www.algebra.com/
- http://www.themathpage.com/
- http://www.algebrahelp.com/
- http://www.algebralab.org/practice/practice.aspx
Reading
- http://www.actstudent.org/sampletest/reading/read_01.html
- http://www.actexampracticetests.com/practice-reading.html
- http://web2.uvcs.uvic.ca/elc/studyzone/570/pulp/hemp1.htm
- https://owl.english.purdue.edu/exercises/
- http://www.thea.nesinc.com/ptwrite.htm
- http://www.tv411.org/reading/
Science
- http://www.actstudent.org/sampletest/science/sci_01.html
- http://www.undergradzone.com/act-science.htm
- http://www.visionlearning.com/en/library/Process-of-Science/49/Using-Graphs-and-Visual-Data-in-Science/156
- http://www.bbc.co.uk/skillswise/worksheet/ma37grap-l1-w-interpreting-line-graphs
- http://www.quia.com/quiz/162310.html