Which practice is least effective for fostering a collaborative library environment?

Implementing exclusive policies is least effective for fostering a collaborative library environment because such policies tend to create barriers rather than promote inclusion and teamwork. Collaboration thrives in an atmosphere of open communication, where individuals feel valued and included. Exclusive policies can alienate certain groups or individuals, hindering the free exchange of ideas and resources that is essential for collaboration. By contrast, encouraging open communication, facilitating teamwork activities, and providing shared resources actively contribute to building a cooperative and supportive environment, which is crucial to the mission of a school library.