Khalsa Montessori School in Tucson. AZ is a culturally diverse, vegetarian, environmentally aware, compassionate learning community. We serve 350 children, infants through 8th grade, on 2 campuses. We are a dynamic community of children, faculty, and families, working together to provide an authentic Montessori learning environment and a nurturing home away from home. Khalsa is a private (for infants through 4 years) and charter (for K to 8th) school which has served the families of Tucson since 1975.