The Washington County High School Class of 2011 graduated Friday night, and 143 members crossed the stage and received diplomas at the annual ceremony. Bob Grider, son of Jerry and Inez Grider of Springfield, was named valedictorian. Naz Taylor, son of Billy and Kathy Taylor of Springfield, was salutatorian. Five students received the Commonwealth Diploma, and they were Kayla Edelen, Josie Lewis, Emily Cecconi, Charlotte Campbell and Bob Grider. Grider and Campbell were also named as National Merit Scholars.