Begin by placing the fingers on the appropriate keys and pressing each key. Begin working the keys up and down (at least 10 times), one finger at a time starting with the right hand pinky. Make sure the student does this while keeping all of the other keys depressed. Move to the ring finger, middle finger and so on up in succession through the left hand to the thumb. Begin again starting with the right hand thumb and work your way back down the flute. Doing this twice during daily practice will ensure that the teacher will never have to put those little pieces of tape on the keys to mark where the fingers go.
Many students first achieve their higher pitches by blowing harder. A better technique to focus on is to use a descriptive term such as " a needle of hot air" to demonstrated that the air does go faster, but only because the aperture has reduced in size. (Otherwise how would players play high notes softly and in tune?) Many students will find that they can control the pitch level by rolling the flute. This technique can cause excessive intonation problems for some students. It is generally better to move the chin forward to change the direction of the air stream (needed for the high pitches) across the tone hole. This method is usually better for controlling pitch. Focus on this technique by setting up a series of long tones (as long as you can play) and playing each new high pitch several times. Make this part of the regular warmup. Ask that the student concentrate on the chin and aperture. Eventually you will want to include slurred octave jumps to this routine. It is easiest to teach the high note fingerings by pointing out that most are related to the lower octave fingerings with the addition of an extra place for the air to "vent".
Articulation patterns on scales must also be a part of the flute player's warmup routine. These will do more to help technique than any other single exercises. Make sure the fingers are relaxed. (The biggest enemy to technique is tension.) Use a metronome and start at slower tempos (well within the capability of the student) and over a period of weeks gradually increase the metronome marking notch by notch. Concentrate on keeping the fingers relaxed, close to the keys, and maintaining a smooth flow from note to note.