We would like to introduce the web tutor ORGANON, which aims to support basic logic courses at the University of West Bohemia in Pilsen (Czech Republic). The application was designed to fulfill two requirements. Firstly, it should help students during their study to practice exercises on their own (providing permanent control during students’ practicing exercises as well as answering students’ questions immediately as they arise). Secondly, it should reduce teachers’ burden (diminishing the amount of consultations as well as administrating students’ homework including correcting and grading). The tutor is available at http://kfi.zcu.cz/lide/dostalova/organon.