In their recent biology unit, MYP 4 Science students explored the cardiovascular system through an engaging hands-on investigation. Under the guidance of Mr. Mark Burman, students observed Daphnia, a translucent freshwater crustacean, to witness the cardiovascular system in action. Because of their transparent bodies, Daphnia provide a unique window into the beating heart and circulatory processes of a living organism. 

Students worked with microscopes to study the tiny creatures and tested the impact of different external factors on their heart rates. They observed the effects of clean water as a baseline and then compared this to the effects of a stimulant (caffeine) and a depressant (alcohol).  

Students reflected on how their own health is influenced by what they consume. As Mr. Burman noted, chemicals can alter the body’s reactions and nerve signals, and this lesson allowed students to see those effects first-hand. This experiential approach reflects the MYP philosophy—linking inquiry-based science with real-life choices to build both understanding and healthier habits.