Read about horace mann, john dewey, the "northwest ordinance of 1787," the "morrill land grant college act of 1862," "brown vs. board of education" decision, and "president lyndon b. johnson’s commencement address at howard university, june 1965." what actions has the federal government taken throughout the nation’s history to ensure that all citizens have an opportunity to obtain an education? explain how each of the documents expands educational opportunities.