Kellie Marcarelli is a middle school science teacher and department chair at Pershing Middle School in the San Diego Unified School District, where she teaches eighth grade physics and chemistry. Beyond the classroom, Kellie serves as a trainer, teacher-leader, and curriculum evaluator and assists in the screening process for the Greater San Diego Science and Engineering Fair. Her professional experience includes working as a staff developer for the Middle School Science Education Leadership Initiative (MSSELI), the California Math and Science Partnership program, and the San Diego Unified School District; presenting regularly at NSTA’s national conference as well as state and regional science education conferences, and working with WestEd’s K-12 Alliance. She is also actively involved in STEM outreach with local professionals in the science community. She is the recipient of the California State Science Fair Teacher of the Year, the San Diego Science Alliance Partnership Teacher of the Year, and the Greater San Diego Science and Engineering Fair Teacher of the Year awards.