This physics website combines a collection of interactive activities and easy-to-understand tutorials designed to make physics learning fun and easy (USA 2013-18).

The site contains Concept Builders, a series of interactive tutorials designed to help students understand and apply physics concepts. They address topics including Newton's Law of Motion, circular motion and gravitation, electric circuits, and waves and colors.

When visitors select one of these concept builders, they will view a series of short tutorials related to the concept. Each tutorial is accompanied by a learning goal, which allows learners and instructors to locate relevant tutorials with ease. To participate in each tutorial, visitors simply need to select "Launch Concept Builder." Next, visitors are prompted to select a level ("apprentice," "master," or "wizard").

Based on their selection, visitors will view six practice problems related to the tutorial's learning goal. Each of these interactive tutorials is accompanied by a helpful set of teacher's notes and suggestions for instructors interested in incorporating Concept Builders into their curriculum.

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