Complex sentence: He received his M.A. in Education from Central Washington State College in 1950, his Ph.D. from Columbia University in 1957, and became the state's youngest ever school superintendent in 1953 when he was hired by the Bellevue School District.
Split into simpler sentences: He received his M.A. in Education from Central Washington State College in 1950, and his Ph.D. from Columbia University in 1957. He became the state's youngest ever school superintendent in 1953 upon leading the Bellevue School District.