I'm a neophyte to ML, but one course I very much enjoyed auditing was "Learning from Data" [1] taught by Caltech Professor Yaser Abu-Mostafa. I found concept of the _Learning Model_ particularly fresh representation of the ML activity (starting at 14:39 in the first video linked here [2])

[1]: http://work.caltech.edu/telecourse.html [2]: https://youtu.be/mbyG85GZ0PI?t=14m39s