Here are some helpful study/practice sites:
I recommend signing up for the question of the day and vocab of the day.
Look for the free apps for your phone as well.
http://englishgrammarpass.com/exercises/tests/62.html - this link has lots of free exercises and vocab lists. VOCAB is always a great practice.
Here is another site we learned about when the sophomores did the ASVAB test:
https://www.march2success.com/ This is a free test prep site where you can create an account. It is sponsored by the Army, but there are no ties to military recruitment, only test prep.
USA testprep - You will have to look over the USA test Prep site and decide for yourself, but it never hurts to use all your resources: