Complex sentence: After graduation, White fought for construction of the first public school for African-Americans in the community of Bayard, then began a sixteen-year teaching career there and later at her alma mater, the Stanton School.
Split into simpler sentences: After graduation, White fought for construction of the first public school for African-Americans in the community of Bayard. That began a sixteen-year teaching career there and later at her alma mater, the Stanton School.