This lesson plan template provides details for a high school anatomy and physiology lesson on the circulatory system. The lesson will have students investigate how heart rate is affected by activity by collecting data on their own heart rates at rest and during exercise. Students will then analyze the data to determine the relationship between exercise and heart rate. The lesson plan outlines considerations for the classroom environment and student factors. It provides national standards addressed as well as specific learning objectives. Details are given for instructional materials, engagement activities, differentiation strategies, and assessments.