Going to be doing a lot of self-studying this summer and found this really great resource for topics in theoretical physics by David Tong.
http://www.damtp.cam.ac.uk/user/tong/teaching.html
Does anyone know of a format similar to this but for topics in mathematics (specifically at the graduate level)?
The internet is full of mathematical lecture notes from all around the world. MIT opensource has a lot of video courses with associated lecture notes, for example. But one source that came to my mind is Cambridge Tripos III lecture notes page. Note that these lecture notes are aimed to advanced studends (specially graduate students).