Final answer:
Today, it is recognized that no single administrator or teacher is expected to possess all the expertise and bear all the responsibility for managing learning.
Step-by-step explanation:
No single administrator or teacher is expected to possess all the expertise and bear all the responsibility necessary for managing learning today. This idea stems from the understanding that education is a complex task that requires collaboration and specialization. Instead of one person being responsible for everything, a team-based approach is embraced, where different individuals bring their unique expertise to support student learning.