Progress at Greywolf Elementary School — both in and about its classrooms — is getting plenty of attention. Last week, U.S. Sen. Patty Murray made a stop on her tour of Olympic Peninsula organizations to learn more about the Carlsborg school’s academic successes along with how well its kindergarten students and staff are adapting to classrooms in its cross-laminated timber building. …She said she was impressed with how open the building feels from the large windows providing natural light to glass doorways to each classroom to sliding doors that open space between classroom spaces. …The CLT buildings are part of a pilot project overseen by the Department of Enterprise Services to address classroom sizes and pioneer the use of of the new construction practices in Washington state.