There are several studies evaluating the role of feedback in medical education, showing promising outcomes. Although, immediate feedback is associated with better knowledge and skills in short-term, few studies have assessed whether immediate feedback could impact the maintenance of skills. The present study aims to investigate the effect of immediate feedback on long-term blood pressure measurement skills. This is a randomized controlled trial including first year students from a Brazilian medical school, which will be randomized in two groups: an intervention group (submitted to a training on blood pressure measurement skills and an immediate feedback after their encounter with an standardized patient - SP) and a control group (submitted to the same training on blood pressure measurement skills, but with no immediate feedback after the SP encounter).