The first step was for students to learn what the body systems are and how they work.
I checked out as many books as I could find on the human body systems at various readability levels. I also used the many scholastic books I owned. I purchased this set this year and it is a very good selection.
I placed books on tables. Each table containg books on a different body system. Students made choices about which system to study, with whom and where to work, and chose print or digital resourses or both. Their task was to learn about the body system they chose and be ready to teach the class about their system.
Students took the job of teaching the class SO seriously. Their work was very detailed and their presentations well practiced. As part of CCSS speaking and listening anchors, students made a class chart before teaching listing good presentation behaviors. Following their lessons students self-evaluated based on the chart and set goals for their next presentation.
I purchased these packets from Teachers Pay Teachers
I created a wiki page with links to sites for each body system
Using the Smart At Body Systems students made models of the body systems they researched.