She’s become a big deal in, wait for it, Management Studies and Organisational Theory (and is called the ‘prophet of management’) but she’s a highly original thinker whose writing on democracy, conflict, authority and difference in the 1920s has deep relevance to a wide range of fields and deserves to be recognised by historians of political thought.
Her wikipedia page gives you a bit of a sense of her life, but it doesn’t really do justice to her wide ranging work or to her thought. Much better is Joan C. Tonn’s 2003 biography Mary P. Follett: Creating Democracy, Transforming Management and Follett’s books The New State (1918), Creative Experience (1924) and her published lectures, Dynamic Administration (1940) and Freedom and Coordination (1949).
And her significance for education?
Citizenship is not to be learned in good government classes or current events courses or lessons in civics. It is to be acquired only through those modes of living and acting which shall teach us how to grow the social consciousness. This should be the object of all day school education, of all night school education, of all our supervised recreation, of all our family life, of our club life, of our civic life. (Mary Parker Follett, The New State 1918: 363)