Students scan a code with a smartphone or iPod or iPod to reveal a subtraction problem!!
To use these QR codes you will need a smart phone or iPad with a QR code reader (free in the app store!). The device must be connected to the internet. Scan the code with the reader and a subtraction problem will appear. Student writes the problem and answer on their paper.
Thank you for downloading this freebie!
Be sure to visit my blog for more ideas, resources, tips and freebies!