I recently learned this term in machine learning called curriculum learning.
While not a perfect parallel, both curriculum learning and waitzkin progress from simplest to most complex
Chess prodigy Josh Waitzkin learned chess in a very elegant way. He first trained to win the simplest endgames, then more complex endgames, then simple midgames, etc. By the time he learned openings he knew exactly what they aimed to achieve.
What else can be learned similarly?