The document discusses how QR codes can be used to engage students in the classroom. It provides information on what QR codes are, how to create them using free online generators, and different ways they can be used for instruction enhancement, student engagement, and improving teacher effectiveness and efficiency. Examples are given of QR codes being used for interactive vocabulary, student-led activities, communication and collaboration. The document also discusses how to create QR codes linked to Google Forms for activities like student sign-ins, surveys, and having students access notes, questions and summaries. Student feedback on using QR codes in the classroom is provided.