Greg Stack is an educational architect, designer, theorist and writer. He combines career-long experience in educational planning and design, and creative vision with the latest research on learning to create educationally sustainable learning spaces. He has planned and designed numerous K-12, college, university and specialty educational buildings during his 31-year career in architecture. As the K-12 Thought Leader for NAC|Architecture, Greg works firm-wide to develop deep knowledge in the planning and design issues of learning environments. He has authored articles on a range of K-12 subjects and has presented analytical perspectives on K-12 topics at a variety of conferences.