Free Online Resources
1. AP Physics, Chemistry, Calculus
College Board contains the most up-to-date information regarding AP courses and AP exams. The curriculum of AP courses may change over time, so make sure you check the College Board website for the most accurate information. College Board also provides AP questions from previous years for students to practice, so make sure you work on those questions before your AP exams. (Website: https://apstudents.collegeboard.org/courses)
Openstax, a nonprofit initiative of Rice University, provides free electronic books and other resources for many AP courses, including Physics, Chemistry, Calculus. If you are self-studying or want to read a textbook, make sure you check the website of Openstax. (Website: https://openstax.org/)
For simulations or experiments related to AP Physics, Chemistry, Calculus, you can visit PHET, an interactive simulation website, created by University of Colorado Boulder. The website contains a variety of simulations and experiments that help students to learn the concepts better. (Website: https://phet.colorado.edu/)
2. F=ma
AAPT, American Association of Physics Teachers, has the most up-to-date information about F=ma competition. In addition to the details of the competition, past tests with solutions are available on their website for you to practice. (Website: https://aapt.org/physicsteam/2025/registration.cfm)
There are no official teaching materials for F=ma specifically. However, many successful students find the Physics textbook by Halliday, Resnick, and Krane very helpful. Others may benefit from the questions in David J. Morin’s book (Problems and Solutions in Introductory Mechanics).
If you have completed F=ma competition, and want to do well in USAPhO, Dr. Kevin Zhou has handouts for USAPhO preparation (https://knzhou.github.io/).