Nicholas, I went to your channel and noticed an abundance of calculus videos. pre-calculus is the only math class in which i did not get an A in all my years of school, & 1 of the 2 classes i failed. I failed pre-calc two semesters in a row in high school , & never went on to calculus ! I was taking other AP classes with consistent A's but pre-calc just did not make any sense to me , try as i may It is interesting , i started watching your calculus videos & was surprised to find that i can actually understand what's going on and am following along and doing the HW problems with you - doing HW problems which i spent hours trying to grasp on my own when i was in school. You are an excellent teacher and i imagine a great tutor as well. I never thought i would find myself trying to understand calculus again , especially not doing HW problems just for fun to try to understand it , but you make learning this easy , and i love learning , so here i am doing my calc homework 6 yrs later at 4am on a tuesday I think i will continue to put in some time watching through your videos and see if i can't start to get a better of understanding of all those things which were so confusing to me at the time. Perhaps if i had you as my teacher i would not have failed the class. A great teacher makes all the difference , truly Thanks so much !