Complex sentence: Thompson attended Littleton High School in Littleton, Colorado, where he was named the Colorado player of the year in 1989 and led Littleton to 24-0 record and the state 4A title.
Split into simpler sentences: Thompson attended Littleton High School in Littleton, Colorado. Thompson was named the Colorado player of the year in 1989 and lead Littleton to 24-0 record and the state 4A title.