I use these QR codes in my kindergarten classroom as part of my Daily 5 rotations for listen to reading. The kids scan the book of their choice and listen on an iPad or any tablet. Students then complete one of the recording sheets and write about the book.
All QR codes link to safeshare.tv which has no ads. Email me (email@example.com) if you have any trouble or would like to request specific books to be added.