1. Editorial

   • Kenneth Ruthven

   EditorialNotes Pages: 1 - 2

2. Announcement

   Announcement Pages: 3 - 4

3. A review of recent research in the area of initial fraction concepts

   • Anne Pitkethly
   • Robert Hunting

   ReviewPaper Pages: 5 - 38

4. Crossing the cognitive gap between arithmetic and algebra: Operating on the unknown in the context of equations

   • Liora Linchevski
   • Nicolas Herscovics

   OriginalPaper Pages: 39 - 65

5. The construction of abstract units in geometric and numeric settings

   • Grayson H. Wheatley
   • Anne Reynolds

   OriginalPaper Pages: 67 - 83

6. Events in learning mathematics: Insights from research in classrooms

   • Terry Wood

   OriginalPaper Pages: 85 - 105

7. Erratum

   Erratum Pages: 107 - 107