From Wikipedia, A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The "QR" is derived from "Quick Response", as the creator intended the code to allow its contents to be decoded at high speed. QR Codes are common in Japan, where they are currently the most popular type of two dimensional codes. Moreover, most current Japanese mobile phones can read this code with their camera.
RT @CambridgeUPELT: How can you use QR codes to create mobile worksheets? @NikPeachey shares his tips and a fun lesson activity too!
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RT @CambridgeUPELT: Save time printing and making photocopies by using QR codes instead! @NikPeachey explains how: https://t.co/md4yNUHsz7