Complex sentence: Workshop and course offerings increased as Kalani became known as a destination retreat center; extensive volunteer, sabbatical, and visiting artist education programs were developed; and Kalani grew to be the largest and oldest retreat center in Hawaii.
Split into simpler sentences: Workshop and course offerings increased as Kalani became known as a destination retreat center. Extensive volunteer, sabbatical, and visiting artist education programs were developed, and Kalani grew to be the largest and oldest retreat center in Hawaii.