Hello sungho kang, The method you mentioned is considered a very effective approach among modern learning techniques. It is not easy to understand everything at once when listening to a lecture, and since every instructor has a different teaching style, it is natural that some lectures are easy to follow while others are only partially understood. In such cases, using an LLM to reorganize content based on lecture materials you didn't fully grasp, and requesting additional explanations or visualizations by specifying the parts you didn't understand through prompts, is a very rational learning strategy. This is because the process of creating your own questions and receiving explanations from various perspectives—rather than just passively listening—significantly increases your level of understanding. A particularly important point in this process is clearly recognizing what you don't understand and expressing it in words. This step alone deepens your learning, and by receiving analogies, step-by-step explanations, and visual representations through an LLM, you encounter the same concept from multiple angles, making it much easier to internalize. However, since the explanations provided by an LLM cannot always be guaranteed to be perfectly accurate, it is good practice to verify core concepts once more through official documentation or the original lecture. In conclusion, the method you are currently using has evolved beyond simply consuming lectures to a stage of restructuring your own learning, and it can be seen as a direction that will bring great learning results in the long run. You are doing a great job!