NPR's Robert Siegel talks with Robert Alvarez, Jr., prof. of Ethnic Studies at the University of California-San Diego. Alvarez talks about his father, Roberto Alvarez, who in 1931, at the age of 12, won a court case to desegregate his grammar school in Lemon Grove, Calif. The Lemon Grove school district had tried to move Mexican American students into a separate building within the school. It was the first successful challenge to school segregation and came 23 years before Brown vs. Board of Education. Alvarez died last Thursday at the age of 84.