Mercer Publishing's OLSAT® practice tests are the #1 ability test prep materials available for testing into your schools TAG (talented and gifted) or GATE program. Each practice test is designed with the same format and number of questions as the actual exam. Each practice test book contains 2 full-length exams at the 4th and 5th grade level and comes with answers and explanations. Downloadable versions of our practice tests are available to both MAC and PC users. For a more in-depth description of the OLSAT exam, utilize our Frequently Asked Questions or Sample Questions pages to answer any questions you may still have.