WOW!!! I L-O-V-E this! Such a thoughtful compliation of activities that allow students to really use the D & C prompts. Excellent! Will be using it for the new school year and directing friends to you, too. :-)
No, a man named Bob Eberle is credited with that. Sorry. I included that in some of my other product descriptions, but forgot to include it on this one.
I use this with my GT K-5 students, usually as a warm-up activity when they first come to my class. Sometimes they get to choose which one they want to do from the pack and sometimes I give them all the same one. It's also an option, sometimes, if they satisfactorily finish up an assignment.
I am not sure which one I originally used, because I have used several. Most recently, I used a website called goqr.me, and it seems to work fine. To read the QR codes on the iDevices, I have used Scan It and Red Laser.