This guy is great. He doesn't look or sound like a math teacher, but he teaches it well. He doesn't come across as a "math teacher." He is like a comrade, like a friend in your class who is helping you. He is more like a fellow participant in the same class. How refreshing. Thank you!
well, I suppose I should have figured it out myself, but when I hear stretch, I think about pulling the parabola by the "arms" out, never thought pulling the "arms" up to make it skinnier. thx.
