Comprehensive lecture notes that I have taken from some of my undergraduate courses at the University of Waterloo are posted here. Feel free to take a look at some of them, and I hope that they may help you.
Do note that many of my upper year courses do not have notes, as upper year PSCI courses tend to involve more essay writing and seminar participation rather than testable lecture material.
If there are no uploaded notes for a course I took and you need more information on the course, feel free to message me on Facebook or LinkedIn and let me know how I can help.