Is it true that students should only take notes on what they understand?

While it is important for students to understand the material they are learning, it is not always necessary to only take notes on what they understand. In fact, taking notes on what they do not understand can be a helpful way to identify areas where they need to focus more attention and study. Additionally, writing notes can help students to process information and remember it more effectively. So, while it is important to focus on understanding the material, it is not necessary to only take notes on what they understand.