Cultivating deep conceptual understanding in high school mathematics is challenging. Geogebra, a software package for dynamically modeling mathematics, is one tool that can help. This hands-on session will explore ways Geogebra can be used to create active learning experiences in Geometry, Algebra, Precalculus, and Calculus. Attendees will participate in some of the presenter’s favorite activities and learn how to find, create, and publish their own.