Re-order paragraphs

d) Americans often forget that as late as the 1960s most African-American, Latino, and Native American students were educated in wholly segregated schools.

c) The end of legal segregation has made a substantial difference for student achievement.

a) On every major national test, the gap in minority and white students’ test scores narrowed substantially between 1970 and 1973, especially for elementary school students.

b) On the Scholastic Aptitude Test (SAT), the scores of African-American students climbed 54 points between 1976 and 1994, while those of white students remained stable.