The TOEFL is an exam that evaluates the possession of English as a foreign language. It is very important for us to know how the future student handles English, since good part of the bibliography and some classes will be in this language. The institutional TOEFL is most recommendable for our posgraduate, Besides the official site, www.toefl.org several institutions apply it in Mexico City and in province. For example, this institutions apply it: Hamer Sharp Institute, the National Autonomous University of Mexico (UNAM) and the National Polytechnic Institute (IPN). If you have already done this exam, its antiquity must not be greater than two years.