Hartsfield Elementary School looks like an average campus from the outside. Inside the school’s front doors, even a keen observer might not immediately notice one of the elements that makes Hartsfield unique, even though it – or they – are just a few feet away, lining the hallways to the left and right: snakes, lizards, a tarantula, even an alligator, all call Hartsfield, HISD’s only Animal and Environmental Science magnet elementary school, home.