1. Doodle: Improve your artistic skills or just let your creativity flow by doodling in the margins of your notebook. Stick to simple sketches or work on more complex designs.

2. Write a story: Unleash your inner writer by starting a short story, novella, or even a novel. Get inspired by your surroundings and create intriguing characters, plotlines, and worlds.

3. Take detailed notes: Instead of passively listening to lectures, actively participate by taking detailed notes. This not only helps pass the time but also aids in retaining the information.

4. Work on puzzles: Bring a puzzle book with you and solve brain teasers like crossword puzzles, Sudoku, or word searches to keep your mind sharp and help pass the time.

5. Learn a new skill: Use extra class time to learn a new skill or improve an existing one. Try practicing shorthand writing or mastering quick mental math tricks.

6. Daydream: Let your mind wander to far-off places or exciting adventures through daydreaming. However, ensure you don’t lose complete focus on the ongoing class.

7. Plan ahead: Utilize the time to map out future goals or create an outline for an upcoming project or assignment. By organizing your thoughts and creating a plan of action, you set yourself up for success.

8. Engage in discussions: Ask thought-provoking questions about the lecture topic and participate in classroom discussions. The more you engage with others and share perspectives, the more stimulated you’ll be.

9. Create mind maps: Draw mind maps for different concepts discussed in class; this will help consolidate your understanding while allowing you to exercise creativity.

10. Read ahead: If allowed, browse through the class textbook or supplementary readings and cover upcoming topics at your pace. By previewing this material before it’s covered by the teacher, you’ll have a better grasp on future lessons.

11. Meditate: Engage in mindful meditation to help maintain focus during class, as well as relieve stress and anxiety. With practice, meditation can contribute to better mental and emotional well-being.

Ultimately, use extra time in class constructively to hone new skills or consolidate your knowledge instead of only trying to pass the time. This way, you’ll be more engaged and productive throughout your educational journey.