apcentral.collegeboard.org的 10 大竞争对手

albert.io

albert gives teachers access to world-class, standards aligned practice content for ap, common core, ngss, sat, act, regents, sstaar and more.

princetonreview.com

Here's what to ask to find out what a school is REALLY like.

varsitytutors.com

These Terms for Education Offerings govern the use of education offerings provided to Schools that have accepted these terms through a contract with Varsity Tutors for Schools.

uworld.com

UWorld can help you prepare for high-stakes exams so that you master the concepts. We offer test preparation, practice tests and assessments for more than 1 million users who are preparing for USMLE, ABIM, ABFM, NCLEX, MCAT, SAT, and ACT examinations. Sign up today!

khanacademy.org

Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

desmos.com

desmos offers best-in-class calculators, digital math activities, and curriculum to help every student love math and love learning math.

quizlet.com

quizlet makes simple learning tools that let you study anything. start learning today with flashcards, games and learning tools — all for free.

highschooltestprep.com

High School Test Prep features hundreds of free practice questions. Online testing for the ACT, SAT, PSAT, and AP exams.

fiveable.me

AP exam prep with study guides, practice questions, AI FRQ scoring, cheatsheets, and score calculators for all 38 AP subjects. 96% pass rate for 7 consecutive years.

crackap.com

prepare for the ap exams. access ap exam overviews, as well as ap exam information, ap practice tests and ap study books for ap students.