Academic Search Premier is a good place to find magazine articles.
The "Scholarly articles" page of this guide has a little more info on using Academic Search Premier. Here I will just say that you can narrow your search results down to magazines by using the magazines checkbox on the left side of your search results page:

Magazines entertain and inform a wide audience. Journalists or even hobbyists write magazine articles.
Magazine articles are very different from scholarly articles. Magazines don't go through peer-review. Magazines are generally written to make money, not because they advance scientific knowledge. As such, many people think information in magazines is lower quality than information in journals. But magazines have a place:
Compared to a journal article, a magazine article will often...