- Exercise in approximating integrals
- How to organize, add and multiply matrices
- Series on the essence of calculus by 3Blue1Brown.
- 3blue1brown's series on probability
- Grant Sanderson (3blue1brown) is a youtuber streaming about mathematics and personally find him very intuitive. He is one of my favorite educational youtubers and have also been called the most outstanding math animation artist on Earth and have been recommended by Numberphile, the art of problem solving, and a variety of other educational youtubers and scientists. He is highly recommended
- Statquest is by a funny guy called Josh Starmer and his video on statistics are simply and easy to digest. Highly recommended.