I am currently working in the electrical field, not electronics. (In the past, I also worked in firmware. Since I didn't major in electrical or electronic engineering, I struggled a lot in the beginning. TT) I often see juniors who focus solely on the formulas themselves, but when asked about physical characteristics, they don't really understand the essence or can't answer immediately. For example, when looking at the capacitive reactance formula $1/(2\pi fC)$, I tell them that rather than just memorizing the formula, they should first get a feel for it: "Since a capacitor's reactance decreases when the change in electricity is large, noise with a high frequency will be effectively removed through a capacitor connected to the ground." I explain that understanding this intuition before memorizing the formula allows them to solve problems faster in practice later on. I believe this lecture is excellent because it focuses more on the fundamental properties of circuits rather than just the formulas. (When I studied, I used formulas to infer basic properties, but the difference here is that this lecture starts with the basic properties first.) However, because it helps you see the essence first and lacks formulas, those who want to study more deeply might find it too simple. It seems difficult to apply the content to practical work based on this alone (I think it's impossible to make practical application possible through a one-and-a-half-hour lecture). Explanations of formulas, inferring basic circuit properties through those formulas, and practical application methods definitely need to be supplemented. I kindly request that you cover these topics in the intermediate class.