Designed as a reference for teaching mathematics in the workplace, this manual presents teaching strategies and activities for beginning, intermediate, and advanced learners in four mathematics-related topics. Following an overview of the manual's purpose, definitions are provided of the three skill levels targeted by the activities. Strategies and activities are then presented for the first topic, easing math anxiety, including methods for recognizing anxiety and identifying realistic expectations, a skills self-assessment form, activities for counting and estimating, and strategies for teaching and understanding word problems. The next section focuses on working with whole numbers and includes activities related to reading and writing large whole numbers, assessing place values, and writing mathematical sentences. The following section presents strategies and activities related to teaching fractions and decimals, including activities to teach students to read and write decimal numbers, understand fractions through the use of pizzas, comprehend improper fractions, and master the use of percent signs. The final section focuses on teaching percentages and rates and includes activities related to calculating rates and bases, using salaries and shopping to teach percentages, creating budgets and frequency distributions, and making pie charts. (BCY)