I am a little behind my fellow students studying development. I was in a hurry but didn't know how to study, but I happened to see this lecture and am taking it. I have taken many lectures, but this is the real deal. While you understand the structures perfectly, you use objects (e.g. straws) to make it easy to understand, so even beginners who don't understand can understand. I couldn't understand the lectures at the academy and thought, "What are you talking about?" Thank you so much. It was definitely worth the tuition. ★Highly recommended!!!!!!!!!!!!!!!!!!!!!!!!!!★