As a result , Southeast 's student body rapidly changed to majority black by the early 1970s .
As more black families moved from the inner city to the more middle - class southeastern section of KC , white families began to flee to the suburbs .
Southeast 's student body rapidly changed to majority black by the early 1970s .
As more black families moved from the inner city to the more middle - class southeastern section of KC , white families began to flee to the suburbs .