1) Social stratification refers to the division of society into hierarchical social groups based on factors like power, property, and social evaluation. 2) There are two main types of social stratification - ascribed (based on attributes assigned at birth like gender, family) and achieved (based on attributes earned through one's own efforts like education and occupation). 3) Education can promote social mobility by allowing people to achieve a different status than their parents through gaining new skills, knowledge, and occupational opportunities. However, elitism in curriculum design may also serve to reinforce the power of existing elite social groups.