This resource explores a useful model for the structure of matter based on simplified kinetic molecular theory. It was developed to help novice learners visualize the structure of solids, liquids, and gases as matter composed of tiny particles in constant motion. The animations help students understand how the movement of these particles is affected by temperature. The pacing of the animation allows it to be adaptable for middle school, high school, and college preparatory courses. Editor’s Note: Be sure not to miss the additional materials in this large collection. Author Mark Bishop also created two textbooks in introductory chemistry (available in free digital format), Power Point presentations for teachers, tutorials, student guides, and more.