Quantitative problems are a major impediment for students in chemistry courses, both a t the secondary and the tertiary levels. In tests and exams. D or D' values1 of 0.50 or lower occur frequently. These results' are'disappointing because of the amount of time and enerev students soend in class and at home on learning how toUs"olve problems. We, therefore. considered it worthwhile to tw to imorove the wav
is Vice President and Unit Operation Leader for the Central Region of the Civil Infrastructure Group of Tetra Tech Inc. He maintains offices in Tulsa, Oklahoma and Kansas City, Missouri. Mr. Nelson has 34 years of experience mostly associated with water and wastewater projects serving local and state government. He holds a B.S. degree in civil engineering from Kansas State University and a M.S. degree in environmental engineering from Oklahoma State University. He is licensed to practice in four states. Nelson served two six-year terms on the Oklahoma State Board of Licensure for Professional Engineers and Land Surveyors. During his tenure on the board, he served two years each as Chair, Vice Chair and Secretary. From 2001-2003 he served as chair of the Engineering Licensure Qualifications Task Force which was a multi-societal committee formed by NCEES to study the engineering licensure system. He went on to serve as president of the NCEES in 2004/05. Nelson is also active in the National Society of Professional Engineers and the American Society of Civil Engineers, and currently serves as Chair of the American Association of Engineering Societies.
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