When studying KS3 citizenship, diversity means cultural diversity. A culturally diverse community contains people from a wide variety of different cultures and backgrounds. These communities can be extremely interesting places in which to grow up. Children in diverse communities will have friends with different backgrounds and can learn a lot about the world and the way other cultures live.
Unfortunately, there are people who cannot see the benefits of living in a diverse culture. Some of them develop a negative attitude towards others because of their colour, religion or ethnic origin. These attitudes are called prejudices and are sometimes passed on from parents to children.
People with prejudices often forget (or don't realise) that they too have a diversity of ancestors.