PLATO Physical Science uses sophisticated computer animation and multimedia instruction to address standards-based scientific concepts at the middle-school level. It was developed for use as a self-study tool in classroom or credit recovery programs, in teacher presentations to introduce concepts, for test review, as a supplement to GED instruction, or to complement textbook lessons. Each lesson is aligned with state standards and the guidelines set by the National Science Foundation and other organizations. The curriculum also features a sophisticated test-item bank linking exam questions to specific, standards-based objectives for pre-testing and mastery assessments. Subscriptions to PLATO Physical Science range from $100 to $300 a year.