This document discusses the use of QR codes in classrooms. It notes that while QR code usage has increased nationwide, some students still lack access to smartphones needed to scan codes. Teachers may use QR codes to provide easier access to homework and flip classroom lessons, though not all students can access this. The document also discusses how QR codes could streamline tasks like classroom inventory but forcing attendance tracking from absences to presence. Overall, the document explores benefits and limitations of QR code usage in classrooms.