This four-part DVD series presents a detailed review of the important concepts in middle school life science relating to the biosphere, ecosystem dynamics, natural cycles and people and the environment. Titles included are: "The Biosphere," "Ecosystem Dynamics," "Natural Cycles," and "People and the Environment." Each program is 20 minutes and has a 30 page teacher's guide with student assessments and activities. The PDF guides for each program can be accessed by putting the DVD into your computer and opening them via Adobe Acrobat Reader on both Macs and PCs.