Complex sentence: Boston Ballet operates an affiliate school with more than 2,000 students; in addition to dance classes for ages 3 through 21, the Boston Ballet Center for Dance Education offers numerous educational and outreach activities for the community.
Split into simpler sentences: Boston Ballet operates an affiliate school with more than 2,000 students ranging in dance classes for ages 3 through 21. The Boston Ballet Center for Dance Education offers numerous educational and outreach activities for the community.