Free official test preparation materials are available to anyone who registers for a Subject Test or who visits the GRE website at www.ets.org/gre/subject/prepare. Each Subject Test practice book contains a full-length test and answer key, test-taking strategies and information to help you understand the score(s) you earned. The appropriate practice book is sent to individuals who register for a Subject Test, or you can download this material free of charge at www.ets.org/gre/subject/prepare.