It’s mortar boards into the air as the members of Deering High School’s Class of 2011 officially become graduates on June 1 at the Portland Expo.Class Marshal Madelaine Burns is all smiles during Deering High School’s 2011 commencement ceremony June 1 at the Portland Expo.The Deering High School chorus performs “I’m On My Way” at graduation on June 1 at the Portland Expo.A trio of girls pose for family pictures outside the Portland Expo on June 1 after the Deering High School commencement.