I’m a retired electrical engineer who’s done a lot of math tutoring over the years. And I’m doing more of it in retirement. I’ve tutored everything though first-year college calculus, with one exception: geometry.
This is because I never took a geometry class, due to some unconventional circumstances. Basically, I fell off the math track in junior high. A few years out of high school, I decided to become an engineer, which required me to go back and take algebra, trigonometry, and pre-calculus, before taking calculus and other higher math classes.
But although some concepts from geometry were embedded in those classes, there was never a requirement for me to take an actual class in it. Geometry seems to occupy a strange position in that it’s still required in middle and high school (at least the ones around here) but a person can graduate from college in engineering without ever taking it.
I remember wishing I knew more geometry when I took statics and dynamics classes during my sophomore year in college. Years later, I went to night school and earned a master’s degree in applied math. Because my undergrad degree was not in math, I was required to take a deficiency course (senior-year-undergrad level applied statistics) and earn at least a B. But there was no required geometry class.
It seems like geometry is a class which helps kids learn problem-solving strategies. And if you learn those in other college math courses like I did, it isn’t really necessary.
But the bottom line is: I want to learn to tutor people in secondary school geometry. I welcome recommendations of methods, specific texts, general suggestions, etc. TIA.