Students at Mountain Valley Middle School in Mexico sign beams Friday that will be installed at the Mountain Valley Community School under construction behind the middle school at 58 Highland Terrace. Principal Carrie Luce said about 800 kindergarten through eighth grade students wrote their names on the supports. Regional School Unit 10 Superintendent Deb Alden said the beams will be installed in the $92 million building in August. Bruce Farrin/Rumford Falls Tmes