Mercer Island Learning Lab 4120 86th Ave SE, Mercer Island, WA98040 Located in the Boys and Girls Clubs building, the Mercer Island Learning Lab is a cooperative preschool operated by…More Bellevue College. "Cooperative" means the parents are required to assume volunteer duties at the school classroom at least once or twice a month. Parents learn childhood development strategies and guidance from their involvement in the school. The curriculum is a play-based, sensory-rich program of exploring and discovering in a learning environment. The school is run by educators Judy Witmer and Nancy Barci, who between them have more than 50 years' experience.