Teaching English nowadays is not an easy task, as English teachers, including those teaching Business English, are constantly under pressure, because they have got to do more than just teaching the language. Taking into account the changes and challenges occurring in the modern world, they have got to prepare the people who are ready to live, study or/and work in a globalised environment, where the basic language of international communication is English. The knowledge of the English language is not the only necessary thing on the way of becoming a global citizen. Some skills are also necessary, which are often named the 21st century skills. There are some practical ways to implement global citizenship education both at the institutional level and in the classrooms. Business English lessons prove to be particularly effective in this respect.