I would recommend (if you’re in “in person” school) that you empty you’re backpack (or book bag whatever you call it) and fill it with clothes and food and things you need to run away. If you take the bus, you can go in the morning right before the bus gets there and your parents shouldn’t know until you get to school at least. Even better if you’re a walker. If you’re drop off, make some excuse (bathroom, sick, etc.) and leave. If your online school, sneak out at night, or say you’re going for a walk. Bring stuff you need, like a lot of food and maybe some clothes. Also you should have a plan. Like how you’re going to get more food. So bring some money too.