Complex sentence: The sports and extracurricular teams have a high success rate; in 2007 the football team won the state championship, and several of the members of the forensics team have gone to compete in the National Forensics League almost every year.
Split into simpler sentences: The sports and extracurricular teams have a high success rate. In 2007 the football team won the state championship, and several of the members of the forensics team have gone to compete in the National Forensics League almost every year.