Learning is a combination of asking questions for clarification, quiet reflection to understand the meaning of the words spoken and action to test the lessons of what was heard. A possible re-examination may be needed to review the lessons and revise its application. Sometimes, this cycle repeats multiple times over many years. (Or as I once was told, “Sometimes you have to hit your head on the same wall enough times, until you decide enough’s enough.”)
The amount of content designed to be presented in a 9 month school year doesn’t always allow for this repetition. Understanding the circumstances for learning, can help students (and their parents) adjust accordingly, so progress is made regardless.