“Culture is like the wind. It is invisible, yet its effect can be seen and felt. When it is blowing in your direction, it makes for smooth sailing. When it is blowing against you, everything is more difficult.” (Bryan Walker & Sarah Soule, Changing Company Culture Requires a Movement, Not a Mandate, HBR, 20 June 2017)We look at two aspects of culture: the culture of your school, and the local, regional and national...