Summarize this article in one sentence.
Missing class will leave you behind on class work and disrupt your study schedule. It may also disrupt the flow of the classroom if your teacher has to delay a lesson to may sure you are caught up on what you missed. Aim to attend all of your classes and miss school only if you are too sick to go. If you do miss class, be sure to borrow class notes from another student and ask to make up any missed assignments. Being disruptive in class will not only keep you from learning efficiently, it will distract others. Always be respectful to your teacher and classmates, and maintain a positive attitude. Being well-behaved will put you in your teacher’s good graces, which may translate into better grades for effort and participation. Being on your best behaviour in class means avoiding distracting classmates. Do not respond to fellow students who whisper at you or try to pass notes to you during class. Let your classmates know that you are trying hard to focus on your schoolwork when you are outside of the classroom so that they don't bother you once the lesson starts.

Summary:
Aim for perfect attendance. Be polite and respectful. Do not engage with distracting classmates.