haha, the egg beater gait.
big q-angle at the knee, due in part to weak abductors at the hip (gluteus medius/minimus). also very weak hip flexors (rectus femoris and iliopsoas).
rather than driving the knee forward (so for a sprinter this would mean get the thigh parallel to the ground, distance runner not as high, but same motion) she is barely using her hip flexors to lift leg and rather is kicking her legs out to the side to drive forward, but for feet to clear ground they get kicked out to side.
do core strength exercises (hip drops, clams, planks, straight leg lifts for abs, etc), and more leg strength - single leg squat (opposite leg up on bench behind her), lunges (forward, back, side-side), hip thrusts, squats, step-ups, mountain climbers (these will be particularly helpful), etc.
then make sure you have her do form drills (skip A, skip B, straight leg bounds, etc).