Aspects of this topic are discussed in the following places at Britannica.
From such experimental programs as the Dalton Plan, the Winnetka Plan, and the Gary Plan, and from the pioneering work of Francis W. Parker and notably John Dewey, which ushered in the “progressive education” of the 1920s and ’30s, American schools, curricula, and teacher training have opened up in favour of flexible and cooperative methods pursued within a school seen as a learning...
...as superintendent of the Gary public schools (1907–38) that Wirt attracted national attention with his idea of splitting the student body into platoons. In its time Wirt’s idea, known as the Gary Plan, caused the city to be known as a centre for progressive education.
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