So for me, if I wanted to learn the subject and get through college, as I planned, I used textbooks and needed one. Someone said it was retarded and you should just "enjoy it", but they're brain dead.I started with Algebra 2/ Calculus while I was in geometry in freshman year, and just "enjoyed it", but constantly was "bullied" by teachers, because they assumed I didn't know anything.
If not for that I would've been an idiot and looked like one. I taught myself then with a textbook, I got a for dummies book and a calculus book, taught myself the whole subject, skipped two grades, got an A and a 5 on the AP exam and those teachers can suck a cock now.
Anyways, after I followed the same philosophy. Not only is it good for academia, but if you want to actually progress, you should learn the pre-reqs, like correctly.
Then again, I'm competitive, so don't listen, someones best answer was we all have our own ways.
But if you want to be master, I just did textbooks and text notes. To learn at surface level you watch lectures or learn leisurely for fun, you will certainly be very good at subsets of a subject, but won't be good nor a master of a subject as a whole.
And I'm not saying as if you aren't a genius who could fill in the rest, no. Lectures and Leisurely offer a fraction, you don't know what you don't know.
A textbook has everything you need a good amount of times, and more.
If you want to master it, I suggest get a textbook for BARE MINIMUM, a reference.
I also went through HS with textbooks in general not just math, for each subject, I have ADHD, and hate teachers, so I would just not listen and come home before a test and read the textbook with everything.
I also have looked at other subjects with this method. With STEM, it's a guarantee work. Note this is different for other subjects ok.
Like CS, you don't use textbooks, nor does anyone, it's more practice and idfk, I just know for sure they don't use textbooks.