One on one a good teacher is far more effective than even the world's best book or video. As a child I was taught one on one when I had trouble. It really got

One on one a good teacher is far more effective than even the world's best book or video. As a child I was taught one on one when I had trouble. It really got me unstuck as needed. I still remember some of those lessons fondly. I used to teach one on one for pay. I've taken the worst cs student in class and in a few weeks made them well above average. I've helped people pass math classes that they were completely failing at in just a few hours. This isn't anything special. And now teaching my PhD students one on one I know each very well. I know what they know, what they tend to miss, and no amount of online videos or books will be better than a tailored explanation designed just for them where I recast a tricky problem into one that they already know. You haven't experienced a good teacher one on one.