Developed as part of a 110-hour high school course on general metals, this 50 minute lesson is designed to enable students to: (1) name the parts of the tape rule; (2) determine what size tape rule to use for a given task; (3) measure correctly with a tape rule or ruler; and (4) dimension correctly for a piece of metal or wood. The lesson plan begins with information on the course for which the lesson was designed; equipment and audiovisual aids needed; requirements for student materials; course objectives; bibliographic references; and special remarks for the instructor. Next, a step-by-step outline of the instructor's presentation is provided in a format indicating the length of time and the equipment or other aids necessary for each step of the lesson. Transparency masters, tests, posttests and answer keys are included. (PAA)