A few days ago I highlighted five Google search products that students often overlook. While it is important for students to know about those tools, they first need to know some basics like how to modify their search terms to get different results.
Applications for Education
This infographic that I published years ago and the search modifiers poster together make a good set of reminders for students. Print them out and post them in your library, computer lab, or classroom. It should be noted that many of the modifiers featured in the poster can also be found by opening the advanced search menu in Google.