Results: The mean age of participants was 28.3 years; 88% were women, and 80% were in their third or fourth year of residency. The percentage of correct answers was higher after participation in the program, and the difference had statistic significance. The residents estimated that nearly a half of their patients needed breastfeeding advice, and they thought that the program improved their knowledge of breastfeeding and their communication skills with mothers. On average, they spent 2.9 hours daily to answer the questions.Conclusions: The learning experience was positively evaluated by the participants and contributed to increase their knowledge and skills in breastfeeding issues. We think it is a good method for training future pediatricians on breastfeeding management. In addition, the instrument may contribute to improve lactation knowledge among pediatricians.