This basic mathematics course is composed of eight lessons. Each lesson contains a pre-test and post-test, problems and examples oriented toward water and wastewater operations, suggested supplemental readings, and estimated time for completion. The topics of the lessons are: (1) numeration; (2) whole numbers; (3) fractions; (4) decimals; (5) percentages; (6) ratio and proportion; (7) squares and square roots; (8) exponents; (9) scientific notation; (10) basic algebra; (11) formulas; (12) roman numerals; (13) the metric system; (14) calculator use; (15) geometry; (16) graphs and charts; and (17) basic statistics. The entire course can be completed in about 40 hours. The prerequisites vary and are specified for each lesson. (BB)