betterexplained.com的 10 大竞争对手

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.

math.stackexchange.com

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

brilliant.org

Scientists and mathematicians are increasingly realizing that Bayes' theorem has been missing from historical analysis. In some cases, scientists were unable to do analysis that is now possible with Bayes' theorem; in other cases doctors and scientists failed to apply Bayes' theorem where it was needed, relying instead on frequency probability.[1] This is especially common in medical testing, where tests are said to be ...

math.libretexts.org

The LibreTexts libraries collectively are a multi-institutional collaborative venture to develop the next generation of open-access texts to improve postsecondary education.

mathworld.wolfram.com

A connected graph G is distance-regular if for any vertices x and y of G and any integers i,j=0, 1, ...d (where d is the graph diameter), the number of vertices at distance i from x and distance j from y depends only on i, j, and the graph distance between x and y, independently of the choice of x and y. In particular, a distance-regular graph is a graph for which there exist integers b_i,c_i,i=0,...,d such that for any two vertices x,y in G and distance i=d(x,y), there are exactly c_i...

purplemath.com

Free online lessons, loads of worked examples, clear and practical explainations, and no-nonsense advice. Purplemath is here to help!

mathigon.org

How can we make education more about creativity than memorising, with personalised content and engaging storytelling?

tutorial.math.lamar.edu

welcome to my math notes site. contained in this site are the notes (free and downloadable) that i use to teach algebra, calculus (i, ii and iii) as well as differential equations at lamar university. the notes contain the usual topics that are taught in those courses as well as a few extra topics that i decided to include just because i wanted to. there are also a set of practice problems, with full solutions, to all of the classes except differential equations. in addition there is also a selection of cheat sheets available for download.

mathvault.ca

The following terms and conditions govern all use of the Mathvault.ca website and all content, services and products available at or through the website.

mathsisfun.com

Play Number Blocks Puzzles. Move the blocks to match the shape. You have to get them exactly right.