An incomplete list of valuable online resources:
Stanford Engineering Everywhere contains lecture recordings as well as course materials for a small number of fundamental courses in Electrical Engineering and Computer Sciences.
NPTEL is the equivalent of MIT OCW offered by premier Indian universities.
For graduate students:
How to have a good career in Research?
https://people.eecs.berkeley.edu/~pattrsn/talks/BadCareer.pdf
Good writing is a major component of research, one whose importance is often underestimated by graduate students. Below is advice on how to write well.
https://www.youtube.com/watch?v=NDlBy2O3Eu4
A brilliant article by Paul Halmos on how to write mathematics.Â
An interesting exchange on writing in the age of AI.