My name is Dean McElroy (Mac), and I have been a high school music and math teacher for 30 years. My primary position is the instrumental music teacher at San Juan Hills High School, but I also have a math credential and have taught various math levels every summer.

I taught AP Music Theory for several years, but as my ensemble class load has increased, another teacher took over that role. Still, many of my instrumental students ask for help, and encouraged me to share these videos for anyone needing assistance.

In math, I’ve primarily worked with students who have failed previously, and over the years I have developed techniques, verbiage, and a general rapport that helps students who once struggled to become confident in math.

I will continue to add lessons, and it is my hope that my personal students can use this as a valuable tool to help them and may become a valuable resource to any student who comes across this page