This Calculus activity on Critical Values, Absolute Extrema, and Relative Extrema is designed for Calculus 1 or AP Calculus and is part of the unit, Applications of the Derivative. Students find critical values, and then apply them to find extreme values. This engaging activity is excellent practice and enrichment to reinforce a lesson before the first derivative test. Included: 20 Task Cards in both color and black and white for easy printing. They are numerically coded.#1 – 7 Determine