Your student moves pom-poms between cups to act out what happens during a first exposure to a germ, the immune response that fights it off, and what remains in the body afterward as a memory cell. The sheet walks through all five stages with labeled procedures and closes with three Think and Reflect questions asking students to explain why memory cells matter, what would happen without them, and to connect the concept to a real-life example such as vaccines. This model of the immune system’s memory cells is well-suited for grades 4-7 and pairs naturally with a unit on human body systems or disease and immunity.

The lab stands on its own as a one-session activity, but it transitions cleanly into the Further Exploration prompt printed at the bottom, which asks students to research how vaccines create memory cells without causing illness. Completing the five-stage model demonstrates that your homeschooler understands acquired immunity as a process, not just a vocabulary word, and the reflection questions push toward applied reasoning rather than simple recall.