40 Interesting Ways to use QR Codes in the Classroom

http://edtechtoolbox.blogspot.com/2011/07/40-interesting-ways-to-use-qr-codes-in.html

25 Fun Ways to use QR Codes for Teaching and Learning

http://www.emergingedtech.com/2014/12/25-ways-to-use-qr-codes-for-teaching-learning/

5 Real Ways To Use QR Codes In Education

https://www.fractuslearning.com/2012/02/20/qr-codes-in-education/

Twelve Ideas for Teaching With QR Codes

https://www.edutopia.org/blog/QR-codes-teaching-andrew-miller

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more on the use of QR code