OHS has purchased a subscription for every student in the school to have access Shmoop resources. As a part of our subscription students have access to:

• ACT Prep Course
  Includes diagnostic test for each section of the test. the diagnostic will  determine student weaknesses and then provide reviews and drill for remediation. Also included are 5 full length ACT tests.
• Study Tools
  Includes the Math Shack which provides students with hundreds of questions to practice mastery of each part of the ACT math test. Also includes hundreds of ACT, SAT, PSAT, and AP video lessons. 
• Learning Guides
  Includes detailed learning guides for several different courses and includes video and practice questions
• How to Shmoop Video

March 2 success provides seven full length practice tests as well as twenty-five decks of flash cards
https://www.march2success.com/

The Learning Express Library four practice tests for each section of the ACT as well as ACT Preparation Courses and Guides. Students can create an account for free. 
Learning Express Library

ACT provides a few free sample questions for each area as well as resources, test tips, and exam descriptions. Test prep materials can also be purchased from ACT. 
http://www.actstudent.org/testprep/