Sissy Squat
Keep the hips open and squat as deeply as you are able without pain.
Cues:
Squeeze the glutes to open hips before you move into the squat
Continue squeezing glutes throughout entire range
Focus more on pushing knees and hips forward than leaning back
Scale:
Adjust range so it is pain free and hips stay completely open with control
Shift back to heels under control after negative and stand as a normal squat
Errors:
Allowing hip to close during descent
Moving too quickly and without control