Use the hair brush to make sure the hair is smooth and untangled. Brush out any knots before beginning the braiding process.
Gather some of the hair from the top of the head and divide it into three sections of the same thickness. Hold the right section in one hand and the left section in the other, with the middle section between your thumb and finger. Cross the right section over the middle section and then cross the left section over the middle.
Use your right hand to add more hair to the right section and then cross it over the middle section again. Gather more hair into the left section with your left hand and cross it over the middle section. Continue repeating this process until you've run out of additional hair to add to the braid.
Wait until you have reached the bottom of the braid and then tie it off with the hair band. Make sure the band is tight so the braid doesn't come undone.