Learning Coo Scales to the Individual

There had been a lot of research that looked at areas like contectural interference, inerleving, tise part hole practice, k r feedback. And they all seem to have mixed results. So why what might be the best practice for you may be you no too hard for me, or vice versa? To optimize our learning coo make sense? It's not one size fits all. This is better, it's what fits best for the individual.