If you're a marine animal, you might be wondering: When will the spring phytoplankton bloom? This makes sense, as these tiny plants form the base of the marine food chain and are an important part of your ecosystem. Students of marine science and related fields can learn more about predicting the spring phytoplankton bloom in the Gulf of Maine via this fine educational resource, which was created as part of the Earth Exploration Toolbook. The materials were created by Denise Blaha and Amy Holt Cline of the Institute for the Study of Earth, Oceans, and Space at the University of New Hampshire. The materials here include teaching notes, a case study file, step-by-step instructions, and tools for exploring this issue. Teachers will note that all of the materials are easy to understand, and the "Going Further" area provides satellite images of phytoplankton blooms from around the world along with other tools.