For the First QR contest at Woodrow Wilson High School, I'm using famous first lines from well-known books and authors. I've selected 5 books and embedded their first line in a QR Code. Here is a Google Doc with the 5 codes.
The students that complete the activity successfully will receive a token prize, while one chosen at random will win a gift card. I'm thinking of using a Google form as a entry form.
If your school uses this activity, please leave a comment.