[header] How to prepare your bag for your first day at high school (girls ) [title] Get yourself a medium/large sized, stylish, sturdy school bag. [step] It doesn't have to cost too much, just a good quality, and it doesn't need to be bigger than you are. If you don't want to spend a lot of money, try a market stall that sells handbags. 
Walmart, target, staples, or places that specialize in school/office supplies are always reliable. Maybe you could even shop online, or take a trip to the mall to browse.