a) OBSERVE what the school day looks like in other countries,
b) analyze textbooks and teaching practices that produce superior results
c) take careful note of classroom practices that respect learners and help learners learn deeply and not just superficially,
d) systematically train teachers in effective teaching techniques.
Boys and girls, all over the world, are exposed to many different kinds of school schedules and school practices, and it is the basic procedure of educational science to carefully observe the different combinations of home, societal, and school influences on children and try to figure out what helps learners have the best results.
Where my wife grew up, it took one teacher to teach 60 pupils. A class size of 50 was an exceptionally small class size. Several of the countries that best the United States in academic achievement
have much higher class sizes per teacher than the United States has. It is definitely possible to improve teacher productivity over the low level maintained in the United States. There are whole books on the subject.
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