Please visit twuphysics.org for videos and supplemental material by topic. These physics lesson videos include lectures, physics demonstrations, and problem-solving. Ms. Twu's AP Physics B / AP Physics 1 and 2 lesson videos are designed for students who have never had physics before. These videos are also used for "flipped classroom" teaching at Eleanor Roosevelt High School. Her AP Physics C lesson videos are designed for students who are at least taking pre-calculus concurrently.