Abstract We present the experience of teaching a course of logic of one semester. The sequence is linear. For each subtopic we teach a theoretical class followed by a practical class, and the topics are teached in sequence following the curriculum. The theoretical classes present definitions, theorems and examples. The practical classes consist in solving the exercises in groups, the practices have solutions and there are additional exercises for which we don´t give the solutions. Students ask questions when they have some doubts about exercises, some questions are answered in person, some in group, some exercises are solved in the boad by the professor, other by students. Keywords: Logic, didactics, didactic sequence, problem based learning, competencies.