Theory of Knowledge essay (TOK essay) is an essential part of the compulsory coursework, which should be written by each IB student in order to get the International Baccalaureate Diploma. Successful TOK essay writing involves specific skills and knowledge acquired during the TOK course. TOK essay should contain up to 1600 words. The topic of the essay is chosen by the student from the list of ten topics offered by the IB. Each topic embraces cross-disciplinary questions based on the course material and each student is required to develop the suggested topic and draw the corresponding conclusions in the TOK essay.