Practice Tests and Questions.
These files are PDFs of Preparing for the ACT from ACT's website: www.act.org. These booklets are freely available, and I have archived previous editions to reference to the changes in test content and focus over the years. Additional practice tests can be ordered through ACT, and ACT provides several practice passages, practice questions, and questions of the day on their website. As always, the best tools for preparing for the ACT are written by ACT. Outside preparation guides do their best to replicate what is on the test, but only ACT writes the actual test.