1. Editorial

   • Fou-Lai Lin

   EditorialNotes Open access Pages: 305 - 306

2. The Nature and Development of Scientific Reasoning: A Synthetic View

   • Antone E. Lawson

   OriginalPaper Pages: 307 - 338

3. Proofs through Exploration in Dynamic Geometry Environments

   • Constantinos Christou
   • Nikos Mousoulides
   • Demetra Pitta-Pantazi

   OriginalPaper Pages: 339 - 352

4. Teaching Linear Functions in Context with Graphics Calculators: Students’ Responses and the Impact of the Approach on Their Use of Algebraic Symbols

   • Caroline Bardini
   • Robyn U. Pierce
   • Kaye Stacey

   OriginalPaper Pages: 353 - 376

5. Intercultural Perspectives on Mathematics Learning – Developing a Theoretical Framework

   • Suzanne Prediger

   OriginalPaper Pages: 377 - 406

6. A Study of Teaching and Learning Number Sense for Sixth Grade Students in Taiwan

   • Der-Ching Yang
   • Chun-Jen Hsu
   • Ming-Chiang Huang

   OriginalPaper Pages: 407 - 430