here you go: Middle school and Junior high school include the grade levels intermediate between elementary school and senior high school. "Middle school" usually includes sixth, seventh and eighth grade; "Junior high" typically includes seventh through ninth grade Most children begin elementary education with kindergarten (usually five to six years old) and finish secondary education with twelfth grade (usually eighteen years old). http://en.wikipedia.org/wiki/Education_in_the_United_States#Ele