Here is one I just made, which links to my school website. I plan to print it out, laminate it, and hang it on the wall just outside of my classroom. Neat-o!
Here is one my 7-year-old son generated to link to one of our most useful sites – spellingcity.com! Unfortunately, we learned through this creation that not every beautiful QR code generated on this site actually works (in all fairness, Unitag states this on the site). Maybe he got too fancy. We’ll post a functional one later on.