Ken, this infographic is a godsend! I remember learning about operators all the way back in junior high school, but I never had any more lessons on it, and they have certainly evolved over time. Some of the new ones that I will adopt in my searches are filetype:, site: ~blahblah, -blahblah, 2013..2014. I tried a search just now, and the results were so much more focused than I’ve ever seen them. Yes! I definitely think these should be taught over and over again in schools so the techniques are drilled into students’ memories. Have you used these tools since you found the infographic? Have your search habits changed at all?