In 1847, Reason, along with Charles Bennett Ray, founded the New York-based Society for the Promotion of Education among Colored Children. Two years later, he was appointed professor of belles-lettres, Greek, Latin, and French at New York Central College, McGrawville, while also serving as an adjunct professor of mathematics. It was a majority white institution. He was the first African American to serve as a professor in the United States. In 1852 Reason left that post to become the principal of the Quaker Institute for Colored Youth in Philadelphia, a post he held until 1856. During his time there, Reason increased enrollment from six students to 118. Here he favored math and the sciences, but gradually included other areas of study, particularly languages. Seniors expected their grades to appear in the most widely circulated paper in the U.S. black communities: the A.M.E.'s Christian Recorder. Half of the students normally failed to graduate. Though instruction was strict, and exams were rigorous, parents scrambled to register their children. Reason returned to New York, where he served for decades in public education as a teacher, administrator, and reformer. During this time, he was instrumental in efforts to abolish slavery and segregation. He successfully lobbied for passage of an 1873 statute to integrate New York'spublic schools. He was politically active in many community groups. After the public schools in New York City were desegregated, he became principal of Grammar School No. 80 at 252 West 42nd Street. Although suffering two strokes that left him physically incapacitated, Reason continued at his post until he retired, some five months before his death. Reason was also a poet. He contributed to the Colored American in the 1830s and was a leader of New York City's Phoenix Society in the 1840s. He wrote the poem "Freedom", which celebrated the British abolitionistThomas Clarkson; it was published in Alexander Crummell's 1849 biography of Clarkson.
Marriage and family
Not much documentation has been found on Reason's personal life, but he was said to have been married and widowed three times. His third and final wife was Clorice Esteve, whom he married in New York City on July 17, 1855. They had no children, although she had a daughter from her previous marriage to John Lucien Esteve, a French West Indian confectioner, restaurateur and caterer in New York City. Charles L. Reason died in New York City in 1893 and is buried in Green-Wood Cemetery in Brooklyn.