Generally it's probably better to be flexible than not. After all, there are many unexpected events in life, and one has to be flexible to respond to the changing landscape of life.
Yet, in school life, if we are always expected to be flexible, people might take advantage of that. They might interpret this flexibility in ways that affirm frequent interruptions, changes in schedule, or staffing changes, and if that happens, the time we count on to teach well will be disrupted and those disruptions can be detrimental to the good work you do.
So while it's good to be flexible in the face of unexpected, natural changes; it's not so positive to be flexible in the face of frequent interruptions and lack of good communication and planning. Onward.
