Study Strategy
I did not buy any prep materials. I searched for as many free review questions as possible. If I didn't know the answer, I wrote it down and went over that and other information like it: EX. if it was a question about the cardiovascular system, I would specifically go back over that. I studied all the body systems thoroughly. I'm really glad I took this toward the end of my first year teaching because I feel like my background in healthcare and teaching 3 different HST classes prepared me well.
Testing Strategy
It was pretty much what I expected. 100 questions, very similar to the review questions I studied. It took me about 2 hours to complete. I starred any question I wasn't sure on and went back through at the end. Some of the answers came to me after going back through. Like everyone else said below - heavy on digestive, nervous, cardiovascular, immune systems, insurance and government agencies, vital sign norms, antibiotics, nutrition and medical terminology. Go over as many practice questions as possible. Go over basics of each body system but definitely know the above pretty well. I haven't gotten my scores back, but I feel really good about it.