Sites and apps similar to OpenAha include Khan Academy, which is free. Other options are Wikiversity, Brilliant.org, mathigon and Maths is Fun. In total there are six Online Education Services like OpenAha for Android, iPhone, iPad and self-hosting.
Khan Academy is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.
United States
Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal learning.
United States
Brilliant.org, also known as Brilliant, is a website and associated community that features problems and courses in mathematics, physics, quantitative finance, and computer science.
United States
Discover Mathigon, a groundbreaking new education platform that adapts to every individual student. Mathematics has never been so colourful.
Math explained in easy language, plus puzzles, games, worksheets and an illustrated dictionary. For K-12 kids, teachers and parents.
Free, open-source “smart web pages” that teach maths, compsci and physics from the age of 5 to 105. One tree of knowledge you climb at your own pace, with animations, interactive diagrams, and randomized quizzes. No sign-up, no subscriptions, no ads.
