my brother is an engineer, his daughter had a love of math, he said after about 3rd grade she was past him. She spent summer at math camps, now 23 and working for the Federal Reserve Bank.
When I was in college (electrical engineering) one of my jobs was being a math tutor for the Veterans Administration working with veterans going to college on the GI Bill. Mostly it was algebra for students that had to take remedial math. Most of the veterans had been out of high school for a looong time.