Audiobooks or lectures to listen to at highschool-level

[WineRedPsy]

(Not a 100% this goes here but oh well)
I imagine there's not a lot of this, since visual presentation is pretty important in these subjects, but does anyone know any good lectures or audiobooks on highscool/Secondary mathematics or physics that one could listen too while taking a promenade?
Edit: Or, if not high school stuff, things a high school student could follow or would maybe have the prereqs for?

 

[occh]

Adrian Banner's Princeton lecture series on Calc I and Calc II was especially good, free on youtube. I know this stretches into post-sec mathematics, but it walks through basically all of single-variable calculus in a very precise way. Also, there is a cheap supplementary book by Adrian ~$20 on amazon.
P.S. I don't think audiobooks would be a good idea, since as you said "visual presentation is pretty important", if you just listened to the audio, the professor will often refer to things he's written on the board and you will be awfully confused.