Related to my suggestion of using Turtle Art as a starting point for
Python and pre-calculus, you might find these Logo books useful for
exploring another direction besides Python. Pythonistas are welcome to
suggest comparable Python titles, of course. And remember, Turtle Art is
written in Python, so this isn't complete heresy. ^_^
Approaching Precalculus Mathematics Discretely, by Philip G. Lewis
Silent Thunder is my name, and Children are my nation.
The Cosmos is my dwelling place, the Truth my destination.