I have a BS in Engineering and a MS in Physics, both from an elite engineering school. I spent a total of 15 years teaching Mathematics, Physics, and Engineering at various US colleges, and I spent an additional 2 years teaching test prep (SAT, ACT, GRE, GMAT) courses for The Princeton Review.
On Guru (and other platforms), I have successfully completed many academic writing projects such as:
* A full book (500+ pages) on AP Calculus with 4 full-length exams (2 AB and 2 BC) and solutions.
* The Math section of an SAT Manual.
* A series fo educational articles on Mathematics.