We just launched a completely free and open 3D computer-animated multivariable calculus course at [calculus.academa.ai](https://calculus.academa.ai) in six languages (English, German, French, Spanish, Italian, and Portuguese).

We're two PhD students, and we're confident in the teaching quality and correctness of these videos. We followed Stewart's Calculus.

Everything is animated with 3Blue1Brown's [Manim](https://github.com/ManimCommunity/manim). We used text-to-speech throughout so we could translate the course into multiple languages.

We used Claude Opus 4.5 for translations. We don't speak all the languages we translated to, but we benchmarked the translations against our native language (Turkish), and the results look very promising. Without LLMs, this course simply wouldn't exist in these languages.

Currently, only 18 of the 35 videos are available. The rest will be coming very soon.

These videos are open to change and improvement since they're not static lecture recordings. If you find any mistakes or have suggestions, please open an issue on the course's GitHub page: [github.com/academa-dev/multivariable-calculus](https://github.com/academa-dev/multivariable-calculus)

We plan to publish more courses in the upcoming months! You can subscribe to our newsletter at [academa.ai](https://academa.ai).

We'd love to hear your feedback, and happy to answer any questions!

3D Computer-Animated Multivariable Calculus Course in 6 Languages