I wondered if anyone else is taking the free Coursera online course
Control of Mobile Robots by Prof Magnus Egerstedt of Georgia Tech?
The introductory lectures are suitable for able High School students, but as it starts to delve into Linear Systems Theory the math assumes college calculus and linear algebra knowledge.
Unfortunately the timing is not ideal, but typically there are reruns of popular courses and the material continues to be available online.
I took a control systems class as an undergraduate back in the late-80s, but this has been a great way to refresh my memory and I hope will form the basis of some rewarding off-season projects for our team.