The higher the social class of other students the higher any given student's achievement.

Particular individuals who might never consider dropping out if they were in a different high school might decide to drop out if they attended a school where many boys and girls did so.

In a high school, the norms act to hold down the achievements of those who are above average, so that the school's demands will be at a level easily maintained by the majority.

As an example, one of the schools I have been studying is too small to compete effectively in most sports, but participates with vigor each year in the state music contests.

Cultural dominance of middle-class norms prevail in middle-class schools with a teacher teaching toward those standards and with students striving to maintain those standards.

The higher the social class of other students the higher any given student's achievement.

The results indicate that heterogeneity of race and heterogeneity of family educational background can increase the achievement of children from weak educational backgrounds with no adverse effect on children from strong educational backgrounds.