I worked with Anna to calculate the different charges on two point sources connected by a rigid, non-connecting rod. At the beginning of the class, I told her to view a video which developed Coulomb's equation and then I worked with her to analyze a diagram of three forces. The forces had to be in equilibrium in the scenario and so the farther point from a third point had to have a larger charge compared to the point closest to the third charge. At the end of the session, Anna was still developing her analysis of the diagram. I assigned her to study the scenario and try to develop answers to questions the activity asked.