If all goes as planned, with fair weather and a favorable fire marshal, Metter Elementary School and Metter Intermediate School will move into a new $32 million megaschool for prekindergarten through eighth grade when classes resume in August. Metter Middle School will join them after Christmas break, pushing enrollment in the 270,000-square-foot, two-story building past the 1,600-student mark. An elevated walkway will link the massive new complex to the Metter High School building, completed 12 years ago.