Massachusetts Institute of Technology - Wikipedia
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The classes are filmed and feature MIT Professors and MIT Students. The content is posted online. The only downside is you need to download/buy/borrow the books.

Understanding Finance

This course explains all the basics of finance

https://ocw.mit.edu/courses/15-401-finance-theory-i-fall-2008/

How to make a good business plan

This course is aimed at MIT Students who want to create a business. It features a rich investor and a guy who created and sold a business to Walmart.

https://ocw.mit.edu/courses/15-s21-nuts-and-bolts-of-business-plans-january-iap-2014/

Introduction to CS and Programming using Python

This course at students with little to no experience. It aims to help peopl feel confident in their ability to write simple programs that allow them to accomplish useful goals.

https://ocw.mit.edu/courses/6-0001-introduction-to-computer-science-and-programming-in-python-fall-2016/

Einstein, Oppenheimer, Feynman: Physics in the 20th Century

This course explains modern physics. What is relativity theory? What is quantum theory? How did a bunch of guys create discover nuclear power? Why are scientists studying invisible particles in space?

https://ocw.mit.edu/courses/sts-042-einstein-oppenheimer-feynman-physics-in-the-20th-century-fall-2020/pages/syllabus/

Speak Italian With Your Mouth Full

This is one of the funniest course. The participants in this seminar will dive into learning basic conversational Italian, Italian culture, and the Mediterranean diet. Each class is based on the preparation of a delicious dish

https://ocw.mit.edu/courses/es-s41-speak-italian-with-your-mouth-full-spring-2012/

Tips

  • The courses are fantastic, but they can be quiet hard. You need to focus and pay attention. I recommend taking them in the morning. Also, get your smartphone out of the room.

  • Take notes. Get an actual pen and paper.