Pioneer Preparatory School: A Challenge Foundation Academy is a tuition-free, public charter school in Phoenix, Arizona’s Maryvale neighborhood, serving grades K–6. Pioneer emphasizes developing students academically as they grow into a community member seeking a purposeful existence as a life-long learner. We would love for you to join our campus community! Schedule a tour to learn more about Pioneer Preparatory School. You can also find us on Facebook or call (623) 933-3733.