It is two-dimensional version of the barcode, known from product packing in supermarkets. It is designed as black and white pixel patterns which looks like random at first but they are actually designed according to the information you want to reach. Up to 7089 digits or 4296 characters can be stored in a QR code.
It is very easy to create. The first thing you should do is going a website (I gave examples below) that generates QR codes then you choose the type of the code and enter the information. You can scan the codes by the QR code scanner applications which are appropriate for smartphones and tablets.
I think the teachers can use it for ease their work. They can create various QR codes with different activities and share them with their students. They can give them tasks, URLs they want their students to check or texts by these codes.
I made a QR code for you as an example, you can scan by your smartphones and check it. You will reach a story named Happily ever after. Hope you enjoy it!
You can use these websites to create your QR code!
https://www.the-qrcode-generator.com/
https://www.qrstuff.com/
https://qrcode.kaywa.com/
http://quikqr.com/?reqp=1&reqr=
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