https://docs.google.com/presentation/d/1NZ3GZUmk7Qw9uwcWV1SRpCbRfn0CRAJaMQ1dLb14cKA/edit?usp=sharing
https://www.boredofboredom.org/individual-tutoring
https://apps.apple.com/us/app/photomath/id919087726 free app for solving equations