Q. Can I post an article I want my students to read to my personal course web page?

No, if access is open to the public, then this use is probably not a fair use.
No exclusively educational purpose can be guaranteed by putting the article on the web, and such conduct would arguably violate the copyright holder's right of public distribution.

Howeever, if the course page is in a Learning Management System, such as D2L, then this could be considered a fair use, depending on the the results of the four factor test outlined at the lionk below.