(ShareCast News) - Construction firm Galliford Try has closed a £55.75m deal with the Shetland Islands Council to build a new high school.Galliford Try said it would carry out the construction of the new four storey high school and three story residential block, and invest £1.7m in the funding of the project.Executive chairman Greg Fitzgerald said the job was part of a growing portfolio of construction projects for the education sector.Shares in the FTSE 250 listed stock were up by 0.17% to 1778.05p at 0845 BST.