Complex sentence: The School at Columbia University is a private K-8 school affiliated with Columbia University for children drawn equally from the Morningside Heights, Manhattan/Upper West Side/Harlem community and from the faculty and staff of the university.
Split into simpler sentences: The School at Columbia University is a private K-8 school affiliated with Columbia University. Students are drawn equally from the Morningside Heights, Manhattan/Upper West Side/Harlem community and from the faculty and staff of the university.