Help with paper? Something about the black children getting bussed?

So I have to write an 8 page paper for humanities and my topic is school integration/bussing. I wrote about general bussing like the montgomery bus boycott, my teacher didn't like that. I wrote about school buses, and she didn't like that. She said something about the African American kids getting bussed to white school? Huh? What's that? Any links of info? Thanks. I'm really confused.