This is the difference between education and training. Use of Proctorio is prima facie evidence you're wasting your tuition. (100% original content, hereby placed in the public domain.)
154 karma · joined March 6, 2018
Dynamical Analogies, by Harry Olson: https://archive.org/details/DynamicalAnalogies
It's in the public domain. I love it so much I had it printed and bound.
The book is based on lectures given in the 1930s & the math is nothing like what we use now. I can't follow a lot of it. But the tables are intuitive & the explanations are very clear.