This guidebook was designed to help prepare students for NCLB science testing. It can also be used as a general reference introduction to the science of small life forms. From the teeniest of nanobes to the oldest species of earth, simple life forms prove to be not so simple. Using accessible language, this narrative helps readers understand the variety of simple life forms, their history, their functions, and their future. Fact boxes serve as a quick go-to reference while studying, and a further resource section provides avenues for additional research and prep. Detailed illustrations, diagrams, charts, and photographs support the narrative and aid visual learners with comprehending new information.