This document summarizes the activities of a school's Erasmus+ project called "United in Diversity" over two years from 2018-2020. It discusses the logo design competition, research into multiculturalism in Poland through a student survey and newsletter, celebrations of the Polish language and folk traditions, study of Polish and partner country proverbs, a fashion show celebrating European cultures, and student mobilities in Italy and Greece where participants shared their cultures and learned about the host countries. The mobilities involved presentations, coding classes, art projects, tours, and performances celebrating diversity and cultural exchange.