You must take your DC Driver's license photo at the DMV office. When you take your photo, you should make sure that you wear what you would wear normally. It's extremely important that your face is clearly shown and recognizable. Look straight at the camera and do not smile, as a resting face is easier to identify.
When you apply for your DC Learner's Permit, you will need to bring proof of your name, your date of birth, your residence in DC and your Social Security Number. If you are under 18, you will need to demonstrate proof of your parent or legal guardian's approval as well.