Students began by learning about plankton and why these tiny organisms are so important to ocean ecosystems. Using microscopes, kindergarteners observed plankton closely, building skills in careful observation and learning how scientists study organisms that are too small to see clearly without tools.

After learning the word buoyancy and how plankton are neutrally buoyant, students explored the concept through a STEM challenge. Using materials like popsicle sticks, clay, and other supplies, kindergarteners designed and built their own plankton models. They tested their creations in a fish tank filled with water, refining their designs to make the models sink as slowly as possible and observing how small changes affected movement in the water.

The unit also introduced students to squids, octopuses, and cuttlefish as they prepare for a squid dissection in February. As part of the unit, students had the opportunity to try on scuba diving gear used by the Middle School TIDES Club, helping them imagine how scientists explore and study ocean environments.