The Grand Coulee Dam Cooperative Preschool will start its school year Tuesday, Sept 4. Preschool gives kids a head start academically and socially and improves readiness for school. Eligible kids will be three by December 1 and potty trained. Three-year-olds will attend Tuesdays and Thursdays 8:30-11 a.m. starting Sept. 4. Four-year-olds will attend Monday, Wednesday and Friday 8:30-11:30 a.m. sta...