Complex sentence: Professor Tyree retired in 1968, with his retirement radio and speech courses at Colorado College were dropped from the curriculum and students took over the extra curricular operation of KRCC with an appointed faculty adviser.
Split into simpler sentences: Professor Tyree retired in 1968, with his retirement radio and speech courses at Colorado College were dropped from the curriculum. After Professor Tyree retired, students took over the extra curricular operation of KRCC with an appointed faculty adviser.