#Teachers: If you put a #QR_Code in your slides and expect your students to visit some website, ALWAYS also provide a clear-text URL or hyperlink (without URL shorteners and trackers).
Not all of your students carry #Orwellian devices (a.k.a. #smartphones) all the time. Extracting a QR code from the slides and putting it through a tool like #qtqr is an unnecessary step.
