If you look in the test taking forum section, there are several links to study guides for the POSS and BMST. The POSS is pretty much like the ASVAB, no real studying needed as the questions aren't very difficult, but you do need some good test taking skills, as they are all timed, and a couple have very little time. If you use the POSS study guide, use it to make a plan for how you'll take the tests. The BMST is like the NF entrance exam, algebra, basic chemistry and physics. When you get this study guide, look up the topics you had trouble with.