**William Briggs** has been on the mathematics faculty at the University of Colorado at Denver for twenty-three years. He received his BA in mathematics from the University of Colorado and his MS and PhD in applied mathematics from Harvard University. He teaches undergraduate and graduate courses throughout the mathematics curriculum with a special interest in mathematical modeling and differential equations as it applies to problems in the biosciences. He has written a quantitative reasoning textbook, *Using and Understanding Mathematics;* an undergraduate problem solving book, *Ants, Bikes, and Clocks;* and two tutorial monographs, *The Multigrid Tutorial* and *The DFT: An Owner's Manual for the Discrete Fourier Transform.* He is the Society for Industrial and Applied Mathematics (SIAM) Vice President for Education, a University of Colorado President's Teaching Scholar, a recipient of the Outstanding Teacher Award of the Rocky Mountain Section of the Mathematical Association of America (MAA), and the recipient of a Fulbright Fellowship to Ireland.

**Lyle Cochran** is a professor of mathematics at Whitworth University in Spokane, Washington. He holds BS degrees in mathematics and mathematics education from Oregon State University and a MS and PhD in mathematics from Washington State University. He has taught a wide variety of undergraduate mathematics courses at Washington State University, Fresno Pacific University, and, since 1995, at Whitworth University. His expertise is in mathematical analysis, and he has a special interest in the integration of technology and mathematics education. He has written technology materials for leading calculus and linear algebra textbooks including the *Instructor's Mathematica Manual* for *Linear Algebra and Its Applications* by David C. Lay and the *Mathematica Technology Resource Manual* for *Thomas' Calculus.* He is a member of the MAA and a former chair of the Department of Mathematics and Computer Science at Whitworth University.