I plan on studying for the September ACT. How far back can I go on CrackACT in terms of their tests and still have an accurate ACT? Are 2007 ACT tests fine to use? I know there are slight differences like the dual passage but, is it still an efficient means of studying?
You really need to most recent official ACT study guide. Old tests are okay, but not ideal. My opinion is that the ACT is a little more difficult now than it used to be. The science section is definitely more difficult. The essay is forty minutes, not thirty. Use the most recent material you can find.