Martha Euphemia Lofton Haynes (September 11, 1890 – July 25, 1980) was an American mathematician and educator. She was the first African American woman to earn a PhD in mathematics, which she earned from the Catholic University of America in 1943. Life Euphemia Lofton was the first child and only daughter of William S. Lofton, a dentist and financier, and Lavinia Day Lofton, a kindergarten teacher. She was the valedictorian of M Street High School in 1907 and then graduated from Normal School for Colored Girls, now known as University of the District of Columbia, with distinction and a degree in education in 1909. She went on to earn an undergraduate mathematics major (and psychology minor) from Smith College in 1914. In 1917 she married Harold Appo Haynes, a teacher. She gained a master's degree in education from the University of Chicago in 1930. In 1943 gained her PhD from The Catholic University of America with a dissertation, supervised by Aubrey Landrey, entitled The Determination of Sets of Independent Conditions Characterizing Certain Special Cases of Symmetric Correspondences. Haynes "contributed quite grandly to the educational system of the District of Columbia." She taught in the public schools of Washington, D.C., for 47 years and in 1966 became the first woman to chair the DC Board of Education, on which she served through 1967. While on the DC Board of Education, she was an outspoken critic of the "track system", which she argued discriminated against African American students by assigning them to tracks that left them unprepared for college. This work contributed towards the filing of Hobson v. Hansen (1967) which led to the end of the track system in DC. She taught first grade at Garrison and Garfield Schools, and mathematics at Armstrong High School. She taught mathematics and served as chair of the Math Department at Dunbar High School. Haynes was a professor of mathematics at University of the District of Columbia where she was chair of the Division of Mathematics and Business Education, a department she created dedicated to training African American teachers. She retired in 1959 from the public school system, but went on to establish the mathematics department at University of the District of Columbia. She also occasionally taught part-time at Howard University. Haynes was involved in many community activities. She served as first vice president of the Archdiocesan Council of Catholic Women, chair of the Advisory