1. The students were asked to analyse a construction process in site, like masonry or formwork, and present it to the group, pointing out the incidence of waste and giving some directions for the solution of the problems observed; during the presentation, the key points of the problems were discussed with the lecturer; until then they knew nothing about the Lean Construction theory; 2. After the first assignment, the lecturer presented the concepts and principles of the Lean Construction to the students; he tried to make links between the problems observed and discussed earlier, and the theory; 3. The next step was the development of an analysis of the same process, through data collection on building site, using tools such as process mapping, flowchart, check list of site conditions, work sample and production chart; the students were also asked to identify wastes and its causes; it took 45 days on average for the students to complete the second assignment. 4. Finally, there was a presentation of the case studies developed, and discussion of the results; the objective at this step was to evaluate whether the students were able to apply the Lean Construction principles for understanding the problems and devising the solutions for avoiding the waste observed.