Contents: G. Kulm, Introduction: Assessing Higher Order Mathematical Thinking -- What We Need to Know and Be Able to Do. Part I:Current Perspectives on Mathematics Assessment. E.L. Baker, Developing Comprehensive Assessments of Higher Order Thinking. T.A. Romberg, E.A. Zarinnia, K.F. Collis, A New World View of Assessment in Mathematics. T. Pandey, Power Items and the Alignment of Curriculum and Assessment. F.K. Lester, Jr., D.L. Kroll, Assessing Student Growth in Mathematical Problem Solving. G. Kulm, New Directions for Mathematics Assessment. Part II:Technology and Mathematics Assessment. R. Lesh, Computer-Based Assessment of Higher Order Understandings and Processes in Elementary Mathematics. D. Strong, Calculators and Mathematics Assessment. J.I. Lipson, J. Faletti, M.E. Martinez, Advances in Computer-Based Mathematics Assessment. Part III:Research and Development in Mathematics Assessment. J.G. Nicholls, P. Cobb, E. Yackel, T. Wood, G. Wheatley, Students' Theories about Mathematics and Their Mathematical Knowledge: Multiple Dimensions of Assessment. S.P. Marshall, The Assessment of Schema Knowledge for Arithmetic Story Problems: A Cognitive Science Perspective. C.C. McKnight, Critical Evaluation of Quantitative Arguments. M. Wilson, Investigation of Structured Problem-Solving Items.