Cecilia Hernandez-Hall received her M.S. in physics from the University of Puerto Rico, Mayaguez Campus, in 1993. After teaching for two years at the Mayaguez and Cayey campuses, she joined the Physics Education Research Group at the University of Nebraska, Lincoln, where research in physics education was conducted with an emphasis on computerized instruction. Professor Hernandez has used computerized instruction with hundreds of her students, and she contributes to the computerized-instruction material throughout PHYSICS LABORATORY EXPERIMENTS. In 1998, Professor Hernandez joined the faculty