Parallel lines are often incorrectly defined as lines that do not intersect. The instructor in a concept video explains the difference between parallel and skew lines. He also refers to the correct notation and symbols during the lesson.

Concepts

geometric vocabulary, parallel lines, skew lines

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Additional Tags

math

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Instructional Ideas

• Provide classes with a graphic organizer, such as a waffle, to record new vocabulary and examples
• Use the video paired with other vocabulary videos as an independent lesson to begin a geometry unit

Classroom Considerations

• Requires Internet access to view the video

Pros

• Explains the concept efficiently and thoroughly

Cons

• Without reference to real-life context, the concept remains abstract

Common Core

HSG-CO.A.1