Complex sentence: He was an English professor at Amherst College from 1903 to 1909, followed by Columbia University from 1909 and 1937, during his tenure he formulated General Honors Course, which later founded the influential Great Books movement.
Split into simpler sentences: He was an English professor at Amherst College from 1903 to 1909, followed by Columbia University from 1909 and 1937. During his tenure at Columbia University he formulated the General Honors Course, responsible for founding the influential Great Books movement.