 As of 2015 , the school enrolls about 80 students , about half of whom are African @-@ American or Latino . The school is divided into upper and lower schools , the former ages 11 to 18 and the latter ages 4 to 11 , though they are not physically separated by age . Children apply for admission and visit for a five @-@ day orientation . Students are admitted by unanimous vote of a teacher @-@ parent @-@ student admissions committee . The group first determines whether applicants ' parents support their decision to attend and whether the school can provide for the students ' needs . The school keeps a waiting list . 
