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48:39 Social Studies Letter from Birmingham Jail - Martin Luther King, Jr. Lesson duration 48:39 760,068 Views
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18:12 Health For parents, happiness is a very high bar - Jennifer Senior Lesson duration 18:12 305,200 Views
04:47 Social Studies A day in the life of an ancient Babylonian business mogul Lesson duration 04:47 1,195,680 Views
