Contents: T.A. Romberg, T.P. Carpenter, E. Fennema, Toward a Common Research Perspective. Part I:Content.F. Demana, H.L. Schoen, B. Waits, Graphing in the K-12 Curriculum: The Impact of the Graphing Calculator. M. Yerushalmy, J.L. Schwartz, Seizing the Opportunity to Make Algebra Mathematically and Pedagogically Interesting. J. Moschkovich, A.H. Schoenfeld, A. Arcavi, Aspects of Understanding: On Multiple Perspectives and Representations of Linear Relations and Connections Among Them. Part II:Student Thinking.S. Dugdale, Functions and Graphs -- Perspectives on Student Thinking. Part III:Teaching Thinking.T.J. Cooney, M.R. Wilson, Teachers' Thinking About Functions: Historical and Research Perspectives. Part IV:Teacher Knowledge.F.A. Norman, Integrating Research on Teachers' Knowledge of Functions and Their Graphs. Part V:Classroom Instruction.C. Kieran, Functions, Graphing, and Technology: Integrating Research on Learning and Instruction. Part VI:Curricular Implications.R.A. Philipp, W.O. Martin, G.W. Richgels, Curricular Implications of Graphical Representations of Functions. Part VII:Reactions.J. Kaput, The Urgent Need for Proleptic Research in the Representation of Quantitative Relationships. S. Williams, Some Common Themes and Uncommon Directions.