This document provides tips and instructions for using PowerPoint presentations on bladder calculi (stones). It recommends showing blank slides to students and asking them to provide information before presenting content. Reviewing content again at the end is also suggested. The document then provides an outline of learning objectives and topics to cover, including introduction, anatomy, etiology, pathophysiology, pathology, classification, clinical features, investigations, management, prevention, and guidelines. Sample content is provided for some slides. Overall, the document outlines a strategy for an active learning session on bladder calculi using PowerPoint presentations.