Princeton Review, McGraw-Hill, and ACT Student have free practice science tests available online. The tests are part of different preparatory programs for standardized student testing. Other sources of free practice science tests include Peterson’s, Number2.com and Kaplan.
As of 2015, the Princeton Review is the second largest test preparation company in the world, with a range of test preparation courses for college admissions, K-12 subject tutoring and the major standardized exams like the SAT. The Princeton Review offers premier packages, but they also offer a wide array of free practice science tests.
McGraw-Hill provides free practice science tests for ACT, SAT, MCAT and GMAT preparation. One benefit of the McGraw-Hill site is that a user can access practice tests directly from the testing home page without having to register or sign up for services. They also offer free videos and other preparation resources, and optional McGraw-Hill professional services are available at a cost.
ACT Student provides seven science passages, each with a number of sample questions. Most of the questions are multiple choice, and have the purpose of preparing students for the ACT Science Test. The site also provides test tips, descriptions, dates, deadlines and more information regarding ACT testing, all at no cost to the user.