This learning resource focuses on understanding the biological clock and sleep debt. Students will learn to map a disrupted circadian rhythm, illustrated by a scenario involving a student named Leo who stays up late playing games, affecting his melatonin production and sleep quality. They will calculate Leo's sleep debt based on his sleep needs versus what he actually got, and engage in analyzing his choices using the DECIDE model to promote better decision-making regarding sleep habits. The activities aim to highlight the importance of sleep for health and academic performance.