Looking for resources to develop my skills in undergraduate Physics and Mathematics

I want YouTube channels that systematically raise my mathematics and physics level

Ali sulieman said:

I want YouTube channels that systematically raise my mathematics and physics level

How about you study actual textbooks ?

YouTube Channels sometimes provide good lectures, but it's an illusion to think that one can learn physics by just watching such lectures. It's also very hard to judge, whether the lecture is really good or whether it's by some crackpot spreading personal "theories". One way to be pretty much on the safe side is to watch YouTube movies provided by universities, i.e., professors giving an actual lecture at a university.

To really learn physics, you should work through textbooks from trustworthy publishers or from manuscripts provided by professors on universities etc. Then you can be pretty sure, that the material in these sources is valid.

Even more important is that you can learn physics only by actively working on it, i.e., you start with reading the textbook/manuscript about a topic you want to learn and then try to solve problems related to that topic to see, whether you've really understood the topic.

vanhees71 said:

Even more important is that you can learn physics only by actively working on it, i.e., you start with reading the textbook/manuscript about a topic you want to learn and then try to solve problems related to that topic to see, whether you've really understood the topic.

This is so true. As others have noted, learning physics by reading alone would be like learning to play piano by reading a book. It simply is not possible.

gmax137 said:

This is so true. As others have noted, learning physics by reading alone would be like learning to play piano by reading a book. It simply is not possible.

Apparently Theodor Kaluza learned how to swim solely by reading a book about it.

haushofer said:

Apparently Theodor Kaluza learned how to swim solely by reading a book about it.

Is this really true? Wiki says

Strange stories were told of his private life, for example, that he taught himself to swim during his thirties of age by reading a book about it and succeeded at his first attempt in the water.

Notice there is no source identified. So maybe it's true. What makes it an interesting story is that it is highly unusual.

haushofer said:

Apparently Theodor Kaluza learned how to swim solely by reading a book about it.

But how fast was he on his first lap?

haushofer said:

Apparently Theodor Kaluza learned how to swim solely by reading a book about it.

So did Sheldon Cooper.