2012 Event In the U.S. state of Connecticut, a shooter kills 29 people, including 20 children, himself and his mother at Sandy Hook Elementary School 1982 Event Heater explodes at Star Elementary School-Okla, kills 6 kids and teacher 1957 Event Nashville's new Hattie Cotton Elementary School dynamited 1956 Event Black students enter Clay Kentucky elementary school 1956 Event Black students enter and are barred from Clay Kentucky elementary school 1908 Event Collingwood Elementary, Cleveland, burns, kills 173 kids and 2 teachers
