In this video, the instructor provides clear, straightforward instruction involving how to solve proofs that involve triangles. Instructor uses a small chalkboard for demonstration. (08:27)

The instructor demonstrates by writing on a purple wall while outside. The concept taught is finding the slope of a line as well as the midpoint using the formulas for slope and midpoint of a line. (06:58)

This instructor teaches outside with huge pieces of chalk to demonstrate how to find the distance of a line on the coordinate plane by using the Pythagorean Theorem. (06:24)

The instructor has returned to the parking garage with his chalk. In this video he gives clear instructions on how he wants the viewer to answer his questions. This series is a good resource for students to educate themselves. (02:43)

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