The two scree-descent techniques: the rocking step slides with loose material under control, the braking step lands heel first on an almost straight leg on firmer ground.
Two out of three hiking falls happen on the descent, and nearly always the same reflex is behind it: leaning back because it feels safer. That is exactly what pushes your centre of mass the way you slip. Do the opposite — stay upright, torso a touch forward, knees loosely bent, rolling over heel, sole and ball. On loose, medium-sized scree the rocking step takes over: heels first, short brisk steps down the fall line, sliding with the material under control instead of testing every stone. Once the ground firms up you switch to the braking step, leading with an almost straight leg. Which technique fits is decided by the ground metre by metre — and you practise it on a harmless flat scree field, not on an exposed crux.