Khan Academy is described as 'Is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere' and is a very popular online education service in the education & reference category. There are more than 100 alternatives to Khan Academy for a variety of platforms, including Web-based, Android, iPhone, iPad and Android Tablet apps. The best Khan Academy alternative is Coursera, which is free. Other great apps like Khan Academy are Codecademy, edX, Udemy and SoloLearn.
Provides free, ad-supported online courses for self-paced learning in a variety of disciplines, accessible globally without entry requirements. Offers assessments, optional ad-free study, and recognizes achievement with purchasable digital or printed certificates, diplomas, and Attestation Letters.
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.
Project-based platform offering interactive, in-browser coding, real data exercises, portfolio-building features, guided projects, career-focused skill tracks, structured learning paths, instant feedback, peer support, and flexible, self-paced modules for data roles.
Take free Harvard online courses through Harvard Extension School's Open Learning Initiative. Course videos feature Harvard faculty.
The OpenCourseWare Consortium is a collaboration of higher education institutions and associated organizations from around the world creating a broad and deep body of open educational content using a shared model.
Stepic is an educational engine and platform, focused on STEM open lessons. Stepic allows for easy creation of interactive lessons with a variety of automated grading assignments.
Duolingo Math is an interactive learning platform that incorporates Duolingo's proven methods into math education, offering lessons in elementary and everyday math for both students and adults.
Academic Earth offers free access to video courses and academic lectures from leading colleges and universities.
iversity.org is the European platform for online learning that enables universities to share a broad range courses with students from around the globe, providing them with the opportunity to earn recognised credentials, no matter where they are.
Ireland
EU
United States
France
Russia
Khan Academy is most helping is Science and Math. and CK-12 is All about MATH and Science