Eight lesson plans on mathematics are presented in this performance-based curriculum unit for distributive education. This unit is self-contained and consists of the following components: introduction (provides overview of unit content and describes why mastery of the objectives is important); performance objectives; pre-assessment instrument (with answer key); and unit outline (table of contents, time required for unit, and materials and resources needed). Lesson plans generally include student information sheets, assignment sheets, and teacher materials (e.g., transparency masters). Lesson plan topics include rounding off numbers, decimals, percentages, figuring salaries, commissions, figuring sales tax, and discounts. The unit also contains a post-assessment with answer key related to the enabling objectives and a unit evaluation. (CT)