How can you pay attention to cultural diversity?

There is an enormous variety of people and cultures in the world. Even the tiny country of the Netherlands has a wide diversity. Whether you teach in a village or a city, or in the inner city or the suburbs, your students come into contact with that cultural diversity on a daily basis. You can pay attention to that diversity in class; in fact, that is an excellent way to include global citizenship in your lessons. But where can you find inspiration? Are there any good examples available?