Complex sentence: The sixties presented traditional boarding schools with many challenges--including how to be relevant in a changing world--and the administration, faculty and trustees struggled with bringing St. Mark's out of its Victorian origins and into the 20th century.
Split into simpler sentences: The sixties presented traditional boarding schools with many challenges--including how to be relevant in a changing world. The administration, faculty and trustees struggled to bringing St. Mark's out of its Victorian origins and into the 20th century.