Cornell class CS4780. (Online version: https://tinyurl.com/eCornellML )
Lecture Notes:
http://www.cs.cornell.edu/courses/cs4780/2018fa/lectures/lecturenote02_kNN.html
Past 4780 exams are here: www.dropbox.com/s/zfr5w5bxxvizmnq/Kilian past Exams.zip?dl=0
Past 4780 homeworks are here: https://www.dropbox.com/s/tbxnjzk5w67u0sp/Homeworks.zip?dl=0
If you want to take the course for credit and obtain an official certificate, there is now a revamped version with 118 new high quality videos, made just for this course, offered through eCornell ( https://tinyurl.com/eCornellML ). Note, however, that eCornell does charge tuition for this version.