CITY OF NEWBURGH — Jennifer Krom's third-graders at Horizons-on-the-Hudson Elementary School know the drill.After filing into the cafeteria's kitchen just after 9 a.m., they pick up a whole-grain egg roll, grab a piece of fruit, and say hello or give a high-five to Kris Schade, the cafeteria manager who greets each child with energy and a smile.