This secondary social studies unit, part two of a series of four, contains classroom activities that involve students in discovering ethnicity in the community, nation, and world. The activities also help students to recognize physical and psychological transnational linkages between ethnic groups in the United States and the cultures of their origins. Although four ethnic groups are emphasized--African Americans, Arab Americans, Mexican Americans, and Irish Americans--the unit is structured so that any ethnic group can be used in the activities. The activities are self-contained and student centered so that students choose the ones in which they are most interested and carry out much of the learning on their own, with the teacher acting as coordinator and facilitator. Students locate evidence of ethnic influences in their homes and discuss their findings, investigate linkages between objects in their homes and those of other groups and nations, use a city's telephone directory to learn about the ethnic makeup of the city, find evidence that their community is an ethnic community, study ethnic organizations in their community, make comparisons about the relative importance of transnational linkages among ethnic groups, and compile a community ethnic directory. (Author/RM)