Complex sentence: The program was an educational success, with students outperforming comparison groups, but because of the hostility from both high schools and university faculty, early entrance programs quickly fizzled out at most participating colleges other than Shimer.
Split into simpler sentences: The program was an educational success, with students outperforming comparison groups. However, because of the indifference and hostility from both high schools and university faculty, early entrance programs quickly fizzled out at most participating colleges other than Shimer.