This fillable pdf or print workbook introduces students to their stress response system and teaches them how to use a heart rate monitor to gather biofeedback and plot their heart beats per minute. As students learn about their autonomic nervous system through a fun-loving character, Inner Lizzy, they are introduced to a practice of self-awareness and self-regulations. Plotting and graphing biofeedback activities reinforce Middle School Science & Engineering Practices in general and in particular, plotting and graphing date for analysis. Sixth Grade Math Standards: 6.SP.1, 6.SP.2, 6.SP.3