Only include a full reference to lecture notes or class materials that are behind a login screen (such as Canvas) if you are writing for an audience that will be able to retrieve them. Otherwise, cite it as a personal communication.
Author, A. A. (Year). Title of presentation [Lecture notes or PowerPoint slides]. Website. http://xxxxx
Preskill, J. (n.d.). Chapter 4: Quantum entanglement [Lecture notes]. Caltech Particle Theory Group. http://www.theory.caltech.edu/people/preskill/ph229/notes/chap4.pdf
As in-text citation:
(Preskill, n.d.)
Matthews, D. (2019). [Lecture notes on evaluating Internet resources]. Canvas at Santa Fe College. https://courses.sfcollege.edu/login
As in-text citation:
(Matthews, 2019)
Source: Publication Manual, 10.14 (example 102); APA Style: Classroom or Intranet Resources