1) I didn't know anything about Docker and couldn't even grasp the concept, but you explained each concept in an easy-to-understand way, which made it very easy to understand. 2) Most of the time, instructors don't re-explain previously written code or explanations, so I had to go back to previous lectures and then come back, which made me feel tired. But you added explanations every time, so I was able to listen to the lecture without feeling tired. 3) Teaching in the order of docker > Dockerfile > docker compose helped me understand how the operation works. The lecture is really well-organized and easy to understand, which is great.