ARIES is a physical science curriculum for students in grades 5-8 that employs 18 inquiry-centered, hands-on lessons called "explorations" that teach motion and forces. The curriculum draws upon students' curiosity to explore phenomena, allowing for a discovery-based learning process. Group-centered lab work is designed to help students build an understanding of inertia, friction, gravity, speed, and acceleration. Students examine their prior ideas about the phenomena, formulate questions, build and use an apparatus to observe natural phenomena, make predictions, and gather data through structured experiments. Exploring Motion and Forces is part of the ARIES sequence of eight physical science units. The ARIES sequences can be used together for an overall curriculum or independently. The AEDC STEM Lending Library has checked out several ARIES Exploring Motion and Forces Kits to area schools and home school groups.