I was surprised to learn that MasterFILE Premiere contained not only popular periodicals like Consumer Reports but also trade publications, biographies and primary sources. I did a search for reviews of various appliances in Consumer Reports and, after some tinkering, discovered that I got better results by doing an advanced search for Consumer Reports AND vacuum cleaner. (This still, however, gave me some irrelevant results.) The various limiters on the left side were helpful, though it was not clear that you needed to actually move the slide, rather than type in the date, to limit the year of publication.
In the ebook collection, my search on hiking turned up some relevant results but also a book on choosing a dog and "Understanding Negative Body Image." That was odd. When I changed my search to "New England hiking," the results were relevant, but only two books were listed.
For the Constitution Day search, I found books on the founding fathers, the Federalist Era, and Lincoln and constitutionalism, among others. I didn't see a way to limit my search to items suitable for young people, though, and I think I'd prefer to use the Middle Search Plus database for this. Several interesting books published by the University of Oklahoma Press turned up in the last search, including a field guide to Oklahoma prehistory and books on archaeology, the Buffalo Soldiers and the creation of the National Park Service. I also found the intriguing title "The Dismissal of Miss Ruth Brown: Civil Rights, Censorship, and the American Library." Interestingly, some of these titles only showed up if I entered "Oklahoma" in the publication field and nothing in the main search field, which patrons would be unlikely to do.