To French braid, you need to make sure your hair is combed and clear of tangles. Start in the back, at the top of the head, with a section that can be separated in three even sections. Now, start on a side and cross it over the middle section. Keep moving down the hair, adding a section of hair, as you go. Finish the bottom with a regular braid. You can find more information here:
. http://2good2lose.com/braid-french.shtml