Public institutions make decisions that shape long-term societal outcomes, yet accelerating climate, technological, and social changes challenge the assumption that the future will be a straightforward continuation of the present. This requires structured methods to examine alternative futures, assess emerging transitions, and ensure that short-term actions remain consistent with long-term objectives. Foresight provides such an approach. Instead of predicting specifi c outcomes, it systematically explores possible and plausible futures, using signals, scenarios, and structured analysis to inform present decisions. The Three Horizons framework supports this work by clarifying how current systems evolve, how innovations emerge during transitions, and how long-term goals can guide strategic direction. Tools such as Local Digital Twins strengthen foresight processes by making system inter- dependencies visible and allowing institutions to test interventions in simulated environments. This learning unit introduces foresight as a systems practice for public governance. Through the Three Horizons model and its practical canvas, learners build institutional foresight capacity and learn to connect immediate planning with long-term, sustainable value creation.