[header] How to sleep in class [title] Slip on a hoodie to hide your face from the side and front. [step] If you're wearing a hooded sweatshirt, lean forward a bit and pull on your hood. Your eyes will be shielded from both the sides and the front, making it a great, natural-looking way to get a bit of sleep. 
[substeps] Look up your dress code rules or review the guidelines for that class to make sure you can wear your hood in class. If your teacher asks you to take your hood off, they'll realize you're asleep.