The purpose of the units in the guide is to supplement, enrich, and reinforce the usual classroom instruction in seventh through ninth grade mathematics, and at the same time, introduce career education. The 14 resource units are not designed to be the primary teaching device for the math topics with which they deal. Each unit emphasizes an occupational setting (such as communications, industry, public services organizations, transportation industry, etc.) and a specific occupation within that setting. The purpose is to give students a chance to explore various business and office occupations while gaining insight into how and why a knowledge of mathematics is important in everyday work life. The resource units may be adapted to fit an individual school's special objectives; the units have been designed so that activities may be added or deleted. The first one or two pages of each unit gives the purpose, briefly describes the major activities, and suggests procedures. A general information sheet provides teachers with background information about the occupation described in the unit. Teacher's keys provide answers to a simulation activity and provide suggestions for related discussions. The student materials for the major activities are located at the end of each unit. (Author/AJ)