I led Anna through three scenarios including harmonic motion due to expanding and contracting springs and pendulum motion. I showed her how the motion of the horizontally mounted spring on a cart would generate a position vs time chart that was sinusoidal. We then analyzed position, velocity, force, and acceleration over time. Then, we studied how measurement of the spring constant would not be time dependent. I also discussed with her how pendulum motion is dependent on the length of the pendulum arm. I briefly introduced the topic of electic charge and electric force. There was no assignment.