Many years ago, I had a senior high math teacher named Charlie Read: a very capable teacher, highly respected. He made math interesting enough that I made an 85 in Geometry, with very little effort. That was convenient, since very little effort was what I gave studies at that time, and most of my other subjects showed it.
Charlie started some geometry courses with flair: he would stand at the back of the classroom and without warning fire a piece of chalk at the blackboard, hitting it with a snap that made students jump, leaving a single yellow mark on the board.
Striding up the aisle to the board, he would bellow, “Take a point!” He would go from there with the basics of geometry: you have a point in space. String points together, an infinite amount of them, and you have a line. With lines, you form shapes: triangles, squares, and more.