I studied orbital mechanics as an undergraduate in aerospace engineering and really loved the course, and now I'd like to share what I learned with the community at large, just for fun, and because space is really really cool!
I'll be covering what "orbit" means, and then move on to different types or orbits, the Earth-Mars transfer, and rendezvous (i.e. how you make sure Mars is in the right place when you get there). If none of that means anything to you, don't worry, that's my job to explain it all :)
This lecture features some basic algebra and geometry. It's not necessary to be extremely well versed in those subjects, it would help, but even if math isn't your strong suit I think you will still be able to pull some general concepts out of this lecture.