This document discusses ways to engage students in science learning through global collaboration using online tools and social networks. It provides examples of how teachers can connect students around the world to share work via blogs, wikis, Skype, and other platforms. Specific projects mentioned include GLOBE, the World Moon Project, tree banding through SHOUT, and an international energy challenge. The goal is to enhance students' understanding of science concepts by allowing them to learn collectively with peers and experts globally.