cross-posted from: https://lemmy.world/post/53797279

hey everyone! I really like how Brilliant teaches, you play with an idea in an interactive way. but it’s like $160 a year so I’ve been making a free one.

it’s called OpenAha. right now there’s 140+ courses and 1000+ lessons in math, physics and chemistry. no account or ads.

a few to try if you only have a minute:

• untangle a graph: https://openaha.org/courses/graphs/planar/?step=1
• draw the house in one stroke: https://openaha.org/courses/graphs/konigsberg/?step=3
• program a little robot: https://openaha.org/courses/coding/sequence/?step=6

honestly I built a lot of it with claudes help, which is why I’d really like people to poke at it. if a lesson is confusing or sth’s wrong, tell me here or hit the flag in the lesson. Also feel free to contribute on github to make this even better.

code: https://github.com/open-aha/open-aha.github.io