I used Teaching Solutions study guide to study for my Principles of learning and Teaching Praxis II exam which I took for my Early Childhood teacher certification state requirement. The organization of the book is nicely done and the practice tests really seemed to help me prepare for the test. Every time I contact my coach in regards to a question about the test I get a response in less than 24 hours as mentioned in the testing services. Great study plan. It helped me tremendously!