Unwilling to show others your notes is not necessarily selfish. Of course, if you don't want to show others your notes, it will bring great inconvenience or hinder others' study and work, then there may be some selfish elements.

In this case, you can consider the conditions for showing the notes to others, such as making the other party promise not to copy or disclose them to others. Or, consider sharing your notes with others, but keep a copy of yourself at the same time.

There are several methods and skills to organize notes for your reference and study.

Method 1: remember the key points and test sites in concise language, and the handwriting needs to be neat and untidy.

What you need to pay attention to when sorting out notes is to increase the density of classroom records, especially those scribbled parts. There is no need to write in block letters, but at least the handwriting should be clean and clear. So that you can know what you have written when you review later.

Method 2: Use post-it notes to supplement and improve the class notes, and mark them with colored pens.

The length of the notebook paper we use to take notes is limited, so there is probably no place to record the knowledge points that should be recorded together after a class. At this time, you can paste other sticky notes in your notes, or paste many other paper-cuts related to knowledge points in this notebook, and then mark the key points with pens of different colors. In this way, the relevant knowledge points can be gathered together, and the review will be more convenient and efficient.

Method 3: Try to explain the knowledge points in your own easy-to-understand words.

If the concept of every knowledge point in the textbook has been refined and refined many times, the result is somewhat obscure. Therefore, when studying, you must first explain it through the teacher, plus your own correct understanding, in order to thoroughly understand the knowledge points. Therefore, when taking notes, you also need to record the information that is helpful for understanding. The concepts already in the textbook don't need to be recorded in the notebook. Concepts and theorems originally in textbooks can be simply marked in the notebook with the page numbers of related concepts appearing in textbooks.