In a recent post over on Mario Armstrong's site, Terrance Gaines asks "What's the hold up?" in more widespread adoption of QR Codes -- it's a good question, as QR codes, despite their blocky-black-and-whiteness, have a lot of potential for educational usage, I think.

QR (Quick Response) Codes are a 2D matrix code that's readable by QR scanners and by mobile phones with cameras. The information in a QR Code can include text, a URL, or other data. And with the correct reader installed on your phone, this means that additional information can easily be decrypted.

I think we can add QR Codes to the long list of reasons why we need to revisit rules about "No cellphones in school," as there are a myriad of educational uses and school projects that they can be used for.

Programs to create QR Codes: BeeTag Kaywa Mobile Barcodes QR Code Generator Extension for Google Chrome reso.ws

"How-To's" and Classroom Project Ideas: Andy Ramsden, Getting Started with QR Codes Mr Robbo, QR Codes in Education? Mark van 't Hooft, ISTE's SIGML Forum at NECC 2009 Honda Wang, via Lifehacker, Use QR Codes for Flashcards You Can't Cheat On

Any other resources or classroom ideas?