Check out Aerodynamics for Students. Looks like there's a fair amount of material that is suitable for algebraic understanding. I'm sure you'll have her in to DiffEq real soon!
“I’m impressed getting that far along with a 10 year old girl. “
It is not as though she is well versed in all of this. She can find for the variable and for two variables if the problem is not overly difficult. More advanced work I hold her hand through it.
I think of it this way; our first admiral, Farragut, took command of a captured whaling vessel at the age of fourteen. He had to have a command of navigation (trig) and a command presence. John Adams’ son went with him to France, he was ten or twelve, he had a command of Greek and Latin and would soon learn French. At fourteen he went and served as secretary to the US Ambassador to Russia and was soon fluent in Russian.
I am woefully lacking at getting her up to where she could be, but she is better than most. Some people think I am mean (including her) as we are doing math at the fair and air show while others are running about being fools. I tell her that it is a metaphor for life and the sooner you come to terms with it the better.