You will need a tinted moisturizer, a concealer, and a foundation a tad darker than your skin color.
Apply tinted moisturizer all over the face, in a reasonable amount. Then, put your concealer under your eyes, and about 3-4 dots under your cheek bones, and spread in evenly, BUT NOT the eyes and cheek bones TOGETHER. Put the foundation on your forehead, mid cheeks, and neck. FEEL FREE TO- Put any eye shadow, eyeliner, or mascara on.
Look at the camera and lift your HEAD UP OUT OF YOUR FREAKING NECK. You don't want to look like a turtle (don't wear a turtle neck c;). Then smile your prettiest smile.. Practice in a mirror before the school day. Try and wear jewelery that would light up your face, or go with your whole outfit.