Steve Zumdahl is the author of market-leading textbooks in introductory chemistry, general chemistry, honors-level chemistry, and high school chemistry. Recently retired from his long-time position as Director of Undergraduate Programs at the University of Illinois, he has received numerous awards for his contributions to chemical education. These include the National Catalyst Award in recognition of his contribution to chemical education, the University of Illinois Teaching Award, the UIUC Liberal Arts and Sciences Advising Award, and the School of Chemical Sciences Teaching Award (five times). He earned his B.S. in Chemistry from Wheaton College (IL), and his Ph.D. from the University of… Illinois.
Raquel Lebredo was born in Camag�ey, Cuba. She attended school in Havana and later enrolled at the University of Havana, where she received a Ph.D. in education in 1950. She was subsequently employed as an elementary school principal, and taught literature and language at a preparatory school in Havana. After living in Spain for a period of time, she moved in 1968 to the United States. Dr. Lebredo was awarded a Ph.D. in Spanish from the University of California, Riverside, in 1973. Since then she has taught Spanish at Claremont Graduate School, Crafton Hills College, the University of Redlands, and California Baptist University, and has authored several Spanish textbooks. In 1985, she was… chosen "Faculty Member of the Year" by the student body at California Baptist University, and in 1991 she received a YWCA "Women of Achievement" award. Prof. Lebredo is retired.Stephen Stoker of Weber State University in Ogden, UT, has taught the gamut of introductory chemistry courses, specializing in GOB, for the past 30 years. Weber State has a very large Health Professions school, and GOB is geared at students with little or no experience in chemistry (notably Allied Health and Nursing majors).