Decision Theatre – The Substance is an interactive theatre session that explores adolescent substance use not through moralising or criminalising approaches, but through psychological and developmental perspectives. Through a dramatic situation, students are placed in a position of decision-making, where the choice between immediate impulse and long-term consequences becomes visible. The session supports awareness of responsible decision-making, impulse control, and community responsibility. Its aim is to encourage participants to reflect on their own decision-making patterns through the question: “What would I do in this situation?”