How the heart works is found in "A Framework for K-12 Science Education" and connects to Life Sciences Core and Component Ideas, From Molecules to Organisms: Structures and Processes (NRC 2012). By the end of grade 2, students should understand that all organisms have external parts, which they use in various ways to seek, find, and take in food, water, and air (p. 144). By third grade, students begin learning the life sciences concept of how the circulatory system functions. In previous years, third-grade teacher Melissa Grumble, regularly used the 5E instructional model. Engaging children in this particular unit on the heart had been a challenge, both in understanding the concepts and sustaining interest. She felt specific concepts, such as the heart's size and location and the path that blood took through the heart (especially that it needed to go to the lungs for oxygen), were difficult for third graders to grasp. This conclusion was reached from posttests from previous years' students. This article describes the process and the integration of performing text--a musical rap--with the 5E instructional model introductory lesson on the heart, which the authors taught over a one-week period.