For teachers wishing to bring a hands-on and creative element to the unit, this lesson provides the template for building a reef in your classroom and can act as the basis for future lessons. Rather than a traditional lesson, these resources describe two possible ways of making your own reef in the classroom: reef-in-a-box and a reef mural. Depending on the time, you have available, you can either use one or both of these approaches over the course of the unit.