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If you got assigned a simple worksheet for French class or a few easy math problems for Geometry, lay that work over your notes. Do your homework inconspicuously and quickly, and remember to look up sometimes to make it look like you're taking notes for class. If you're worried about having your homework confiscated, ask your teacher if it's okay to do the homework in their class. Some teachers might only allow this if you've already finished the lesson or work for their class that day. If you have a lot going on in your classes, use boring class time to write a list of things you need to do to clear your mind. Try making a timeline of things to do for an upcoming project or a study schedule for your exams. You can make different lists for each of your classes or just make one longer list for all of your classes and activities.  Making lists can encourage creativity and help get rid of anxiety about upcoming assignments or tests. Keep in mind that you can make lists about pretty much anything. If you want to make a list about your top 10 favorite movies or books, you can! If you feel like you've taken a million notes and just can't pay attention anymore, go back through and review your notes. Highlight important parts, underline information you need to know for a test, and draw pictures of important figures and ideas. When you look back over your notes to study, your doodles and markings can help you remember the information.  This will keep you entertained and engaged with the lesson so you're still doing a bit of studying! You can also draw geometric patterns, circles, or even random shapes in the margins of your notes. Most teachers won't mind a little doodling since it keeps you occupied and you don't disturb the class. Come up with a story about your favorite fictional character, your favorite celebrity, or even yourself! Keep your pen or pencil on the paper and let your thoughts roam free to write a short story. Remember to look up occasionally so that your teacher thinks you're writing notes for class.
Do easy homework for another class. Jot down a to-do list or a weekly schedule. Use colored pencils or pens to doodle and decorate your notes. Write a short story in your notebook.