The document provides an overview of various free web 2.0 tools that can be used in K-12 classrooms for creating, collaborating, communicating, and contributing online. It discusses tools like Animoto, Flickr, Google Docs, SlideShare, podcasts, wikis, blogs, and online worksheets that allow students to share work, give feedback, and learn from each other in new ways. The teacher emphasizes that one size does not fit all and teachers should explore different tools to find what works best for their students.