Your experience sounds spot on to me. No matter what you are teaching, whether it is fundamental like reading, physical like a sport, or technical like program

Your experience sounds spot on to me. No matter what you are teaching, whether it is fundamental like reading, physical like a sport, or technical like programming, it is critical to teach ONE THING at a time. Teaching multiple concepts at once muddles the exercise and slows down learning. Breaking large concepts into discrete blocks lets the student focus and then build on that concept as they continue. That's certainly how I work, and how I've heard experienced teachers explain it.