As much as I love the Modernist Journals Project, I do like to assign hard copy reproductions of magazine issues (with advertisements!) to my students whenever possible. This gives them access to some magazines that are not available on the MJP, and it mimics more closely the experience of the original readers of the magazines.
Below are links to three reproductions of magazines issues that are easily available. I would love to hear of others, so, if you know of any, please do note them in the comments.