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May 4, 1796, Franklin, MA
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After returning to the U.S., he emphatically lobbied for the adoption of the ‘Prussian model’.
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Mann served in the U.S. House of Representatives from 1848 to 1853
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In 1852, he backed the decision of adopting the Prussian education system in Massachusetts and after its adoption the New York Governor implemented the system on trial basis in twelve schools of New York.
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August 2, 1859, Yellow Springs, OH
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