Print the QR codes and post them around the room. Students will visit the code, scan it with an ipad/ipod or web cam. Students will read the clock and record the time in the appropriate box on the record sheet. We had the students do it in pairs. They visited the code, scanned it with their device and returned to their seat to read the clock and record the time on their sheet. There was no need to go in order as long as they recorded the time in the appropriate box. The students were extremely motivated and engaged.