The second volume of this proceedings contains the papers presented at the 21st annual meeting of the Mathematics Education Research Group of Australasia. Full papers include: (1) "Teachers Interpreting Algebra: Teachers' Views about the Nature of Algebra" (Brenda Menzel and David Clarke); (2) "Long Odds: Longitudinal Development of Students' Understanding of Odds" (Jonathan Moritz); (3) "An Arithmetic Game with Strategic Components--Playing Procedures of Primary School Children" (Doris Mosel-Gobel); (4) "Ability Grouping: Some Implications for Building Mathematical Understanding" (Judith Mousley); (5) "Ethnographic Research in Mathematics Education: Using Different Types of Visual Data Refined from Videotapes" (Judith Mousley); (6) "A Research-Based Framework for Assessing Early Multiplication and Division Strategies" (Joanne Mulligan); (7) "The Use of Mathematical Function Plotters in Teaching Introductory Calculus" (Bruce Nevill); (8) "Children's Matching of Melodies and Line Graphs" (Steven Nisbet and John Bain); (9) "Identifying Separate and Connected Knowing in Mathematics Education" (Jude Ocean); (10) "Developing the Angle Concept through Investigations" (Kay Owens); (11) "Is There a Need for a Mathematics Intervention Program in Grades 3 and 4?" (Cath Pearn); (12) "Year 3 Students' Place-Value Misconceptions: Another Look At MAB" (Peter Price); (13) "Teaching Mathematically Gifted Students in Primary School" (Ian Putt); (14) "Orchestrating Different Voices in Student Talk about Infinity: Theoretical and Empirical Analyses" (Peter Renshaw and Raymond Brown); (15) "Measuring Attitudes towards Mathematics in Early Childhood and Primary Teacher Education" (Carolyn Roberts, Patricia Cretchley, and Chris Harman); (16) "A Survey of Graphics Calculator Use in Victorian Secondary Schools" (Alla Routitsky and Patrick Tobin); (17) "The Search for Pattern: Student Understanding of the Table of Values Representation for Function" (Julie Ryan and Julian Williams); (18) "Parent Newsletters Supporting Mathematics in the Junior Primary School" (Jan Savell); (19) "Challenging Beliefs about Mathematics Learning and Teaching Using an Electronic Learning Community" (Sandra Schuck and Gerry Foley); (20) "Mathematics Textbooks: Messages to Students and Teachers" (Mal Shield); (21) "Problem Solving through Problem Posing: The Experience of Two Teacher Education Students" (Beth Southwell); (22) "Teachers Building Number Sense Amid the Challenges of Change: Some Case Studies" (Len Sparrow and Alistair Mcintosh); (23) "The Invisible Wall Project on Problem Solving Processes: Concepts and Methods of Interpretive Work with High Resolution Data" (Martin Stein); (24) "The Incidence of Misconceptions of Decimal Notation amongst Students Grades 5 to 10" (Vicki Steinle and Kaye Stacey); (25) "Kindergarten Students' Progress in the Count Me In Too Project" (Rita Stewart, Bob Wright, and Peter Gould); (26) "Task Context and Applications at the Senior Secondary Level" (Gloria Stillman); (27) "Different Forms of Mathematical Questions for Different Purposes: Comparing Student Responses to Similar Closed and Open-Ended Questions" (Peter Sullivan, Elizabeth Warren, Paul White, and Stephanus Suwarsano); (28) "Student Choice of Computation Methods" (Paul Swan and Jack Bana); (29) "Mathematical Misconceptions--We Have An Effective Method for Reducing Their Incidence but Will the Improvement Persist?" (Philip Swedosh and John Clarke); (30) "Dynamic Scaffolding and Reflective Discourse: Successful Teaching Styles Observed within a Project To Teach Mathematical Thinking Skills" (Howard Tanner and Sonia Jones); (31) "A Computer Environment To Encourage Versatile Understanding of Algebraic Equations" (Mike Thomas and Diane Hall); (32) "Teacher Beliefs about the Learning and Teaching of Mathematics: Some Comparisons" (Danielle Tracey, Bob Perry, and Peter Howard); (33) "Exploring the Impact of CAS in Early Algebra" (David Tynan and Gary Asp); (34) "Computers Are Taking Mathematics into the Next Century: Gender Differences in the Attitudes of Secondary Mathematics Students to the Use of Computers" (Colleen Vale); (35) The Mathematics, Technology and Science Interface: Implementation in the Middle School" (Grady Venville, John Malone, John Wallace, and Leonie Rennie); (36) "Progressing through the van Hiele Levels with Cabri-geometre" (Jill Vincent); (37) "What Is 'Meaning' in Gender Research?" (Margaret Walshaw); (38) "Students' Understanding of the Concept of the Variable" (Elizabeth Warren); (39) "Numeracy Benchmarks for Years 3 and 5: What about Chance and Data?" (Jane Watson); (40) "'This Is a Funny Game--You Can't Say Who's Going To Win!': Three Case Studies of Children's Probabilistic Thinking" (Jenni Way); (41)"Beliefs about the Use of Calculators in an Upper Primary Mathematics Classroom: A Partial Application of the Theory of Planned Behaviour" (Allan White); (42) "Metacognition within Mathematics: A New and Practical Multi-Method Approach" (Jeni Wilson); (43) "An Overview of a Research-Based Framework for Assessing and Teaching Early Number" (Bob Wright); (44) "Language, Mathematics and Social Disadvantage: A Bourdieuian Analysis of Cultural Capital in Mathematics Education" (Robyn Zevenbergen); (45) "Mathematical Saturation within Workplace Contexts" (Robyn Zevenbergen). (ASK)