05:37
Naming Whole Numbers: Separating Large Numbers Into Periods
This clip explains the use of commas to organize the digits within a number into groups or periods.
00:41
Frames of Reference: Group Identification and Political Participation
Groups are a more compelling frame of reference than ideology for most Americans. Religious differences, for example, can be a source of political solidarity within the group and a source of conflict without. During the 1960s the civil rights moveme...