We report on progress towards the development of an Action Concept Inventory (ACI). a test that measures student understanding of action principles in introductory mechanics and optics. The ACI also covers key concepts of many-paths quantum mechanics. from which classical action physics arises. https://www.animationbengal.com/?w=mega-price-the-cafe-terrace-on-the-place-du-forum-arles-at-night-c-1888-sale-top-super