Come experience the life of boarding school! Hanna boarding school offers summer camps for students to live independently in a supportive fun environment. Hanna Center is a residential treatment & educational service organization in Sonoma California, for boys who are seriously at-risk for behavioral health problems. Hanna Boys boarding school has more than 100+ boys ranging in age from 13 to 18 years. Want to know regarding the admission process at the Hanna Boys Center, A Boarding School for Grades 8 - 12. Enquire at Hanna Residential Treatment Center, A Boarding School for troubled youth. Help provide our students with the materials & living supplies they need.