The Collaboratory Notebook is a networked hypermedia database that allows students to collaborate on scientific inquiries across boundaries of time and space. Developed as part of the Learning Through Collaborative Visualization (CoVis) networking testbed, sponsored by the National Science Foundation, this software expands on the idea of traditional science lab notetaking. The Notebook provides an introduction to the process of scientific inquiry for beginners. It allows students to record their own ideas privately or publicly, browse the recorded ideas of others, and participate in collaborative dialogue and visualization about those ideas. The Collaboratory Notebook has been used by teachers and students in five earth science classes at Evanston Township and New Trier High Schools in suburban Chicago. They are exploring its uses within the large CoVis community which includes over 300 students, teachers, educational researchers, and research scientists. (Author/BEW)