GeoGebra

With over one million online activities designed to help students explore a wide range of mathematical concepts, “GeoGebra” provides examples and dynamic simulations of various topics. Its content is relevant to the Grade 6–12 math curricula and suitable for students at the middle-school and secondary levels. Students and teachers can use its existing activities, tools, calculators, and simulators or customize the content with their own free accounts. With its resources, lessons, activities, and interactive examples, teachers may use the resource to introduce a particular math concept, to practice skills, or for extension and follow-up activities.