This yearbook focuses on the role of technology in school mathematics. Chapters are replete with classroom-tested ideas for using technology to teach new mathematical ideas and to teach familiar mathematical ideas better. Chapters included: (1) "Using the Graphing Calculator in the Classroom: Helping Students Solve the "Unsolvable" (Eric Milou, Edward Gambler, Todd Moyer); (2) "Graphing Changing Averages" (David Duncan, Bonnie Litwiller); (3) "Making More of an Average Lesson: Using Spreadsheets To Teach Preservice Teachers about Average" (John Baker); (4) "In the Presence of Technology, Geometry is Alive and Well--but Different" (Gina Foletta); (5) "Composing Functions Graphically on the TI-92" (Linda Iseri); (6) "Signifiers and Counterparts: Building a Framework for Analyzing Students' Use of Symbols" (Margaret Kinzel); (7) "Exploring Continued Fractions: A Technological Approach" (Tom Evitts); (8) "The Isosceles Triangle: Making Connections with the TI-92" (Karen Flanagan, Ken Kerr); and (9) "Mathematically Modeling a Traffic Intersection" (Jon Wetherbee). (ASK)