We have already discussed here the need that exists in class: answer to everything the teacher says in order not to miss anything. In this way you can always be informed, in addition to knowing everything that the teacher will tell you. Let's focus on the first thing we have told you. Information. What if you knew what happens in class? Basically, you would miss a lot of things, and could even go as far as suspense.
Attention to inform yourself is essential because the teachers, among other things, will tell you what you have to do at home. That is, they will comment on the homework that you have pending and, in case you do not know, the teachers will verify that you have a problem. In fact, you will not be able to carry them facts since you do not know their existence. An error that can cause more than one inconvenience.
There are many teachers who pay special attention to the fact that you have carried your assignments every day, so it is highly recommended that you do your best. In addition, that will also help you study, since they will be related to what you have learned in class. As you can see, two things are done at the same time. And they will affect your benefit.
In short, it is highly recommended (and necessary) that you attend in class. Don't forget that homework is very important. Try to always carry them done. That will make your note go up and your performance, in the same way, will be improved in different ways. In the event that you have any inconvenience, you can always ask the teachers themselves.