The Amazing Web 2.0 Projects Book lists over 100 projects with objectives, defined grade level or age range, links to additional information (including how-to's) about the project, and tips for teachers planning to use the project.
Nota allows you to use files from different sources and edit them together. Then you can share the file with others to allow additional edits, comments and more.
The MathTrax Graphing Calculator is a tool that provides alternative access to mathematical data. In addition to drawing graphs of equations, MathTrax provides alternative, accessible descriptions of graphs using text and sound.
Information about each planet and moon in our solar system with many pictures, discussion of the history of its discovery, exploration, and physical characteristics. In addition to the planets, there are also pages about the Sun, many moons, and asteroids