Secondly, look for sentence patterns, use different marks, and pay attention to the usage next to them.
Finally, vocabulary, useful words are marked, for example, horizontal lines are used to express phrases, and then words are enclosed in brackets, meaning on the side.
To learn English, we should first talk to more people, preferably foreigners. Almost equally important is listening more, and finally reading more.
The teacher's method is not necessarily right. It's up to you. Finding the right method is the most important thing.