Today’s post is brought to you by the letters Q and R. It’s me again, Matt, that same guy that created plaid. Today I wanted to share one of my favorite tools, QR Codes. “I’m pretty familiar with them,” you think rolling your eyes at me and noticing a quick response code on your McDonald's cup while perusing through the latest issue of Highlights and Ranger Rick. And I totally get that—but I figured I’d show you how I use them in my class and around school. There’s a lot of different ways QR...