This document discusses tools for 21st century teaching and learning including collaboration, communication, and developing skills like critical thinking. It provides examples of online tools for creating content, sharing files, polling, backchanneling and more. The goals are to engage 21st century learners in creating rather than just consuming content, while still providing rigorous lessons, and to help teachers prepare students for the modern world through technology. Examples of specific tools mentioned include Twitter, Wallwisher, Animoto, Storybird and Voicethread.