khanacademy.org的 10 大竞争对手

coursera.org

Quickly reference essential CSS properties, selectors, and rules with this comprehensive CSS Cheat Sheet. Improve your web design skills with clear examples and descriptions

study.com

Take online courses on Study.com that are fun and engaging. Pass exams to earn real college credit. Research schools and degrees to further your education.

ixl.com

IXL is the world's most popular subscription-based learning site for K–12. Used by over 18 million students, IXL provides personalized learning in more than 17,000 topics, covering math, language arts, science, social studies, and Spanish. Interactive questions, awards, and certificates keep kids motivated as they master skills.

quizlet.com

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

byjus.com

byju's comprehensive e-learning programs for k3, k10, k12, neet, jee, upsc & bank exams from india's best teachers. join today to fall in love with learning

udemy.com

Udemy is an online learning and teaching marketplace with over 250,000 courses and 73 million students. Learn programming, marketing, data science and more.

math.stackexchange.com

Q&A for people studying math at any level and professionals in related fields

desmos.com

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

k12.com

Find the answers to the questions you may have about online schooling with a K12-powered school, so you can help unlock your child’s success.

kahoot.it

join a game of kahoot here. kahoot! is a free game-based learning platform that makes it fun to learn – any subject, in any language, on any device, for all ages!