I used the following materials to study:
1. A
wonderful document from the Specific Feedback section. I probably could have passed this test by simply reading over this once or twice. If you have a current InstantCert subscription, definitely take advantage of this document!
2.
The Wise Owl Guide to DSST Environment & Humanity. This was another very helpful resource. It had a great glossary (very important to me: that is what I usually review on my way to the testing center on the day of the exam), a good amount of information on the test (without going into unnecessary detail), and a full-length practice test that was relatively similar to the exam.
3. The DSST practice tests from Prometric. This gave me a good feel for how the computer screen would look on testing day (this was my first DSST) and had questions extremely similar, if not identical, to the actual exam. There are two 50-question practice tests available, and each is $5.00.
4. Two sections of InstantCert's flashcards.
5. I used this free 50-question practice test. It helped me judge what areas I needed to improve on and the study guide, although I did not use it, looks good, too.
http://www.dantestestprep.com/free-study...e-Test.pdf
Hope this helps! Let me know if you have any further questions.