Algebra I / Data Analysis:
Textbook
Notebook (spiral or 3-ring with looseleaf)
Graphing Calculator (TI-83, 83+, 84, etc)
Ruler 
Graph Paper
Pencils (no pens)


Geometry:
Textbook
Notebook (spiral or 3-ring with looseleaf)
Calculator (scientific or graphing)
Ruler
Protractor
Compass
Index Cards
Pencils (no pens)
Colored Pencils