On Keyword.io you can enter a search term and have a list of related search terms generated for you. These are different and more comprehensive lists than Google's default "people also search for..." suggestions.
Applications for EducationIt should be noted that Keyword.io is a service that is designed for search engine optimization and search engine marketing professionals. For that reason, you'll see a lot of ads for purchasing marketing products that Keyword.io offers. You can ignore those ads and just look at the lists that are generated for free. Those lists can help you and your students come up with some new search terms to use when conducting online research in Google, Bing, and elsewhere.
On a related note, you might also be interested in these articles that I've previously published about search strategies: