The document discusses content exploration tasks and tools. It defines tools as instruments used to accomplish goals and tasks as activities assigned with goals in mind. Content exploration tasks help students obtain new knowledge, review knowledge, or apply knowledge. There are different types of tools that can be used for content exploration tasks, from least complex reference tools to more complex open-ended tools, including tutorials, drills and practice, educational games, simulations, and open-ended tools. The document provides examples of various tools that fall under each category and can be used for content exploration.