This document discusses elements of 21st century classrooms. It describes how 21st century classrooms utilize technology like interactive projectors, whiteboards, student computers and devices, and interactive response systems to enhance teaching and learning. The document emphasizes that 21st century classrooms are real today and can make a significant difference in how teachers teach and students learn compared to more traditional classrooms. It also discusses how technology has become integral to the educational experience and defines what 21st century learners and teachers look like in terms of their use of technology.