Have you ever walked into school then you remember that you forgot something and it's to late to go back. An emergency kit is ideal for this situation.
First you will need a small but spacey bag to put all the stuff in.
Then you will need a small lip balm for dried lips.
Then a small packet of tissues for when the class is out of them.
A Hairbrush and some hair essentials if you forget to brush your hair or tie it up.
Small roll-on of deodorant for after gym or if you forget to put it on.
Small bottle of hand sanitizer in case you touch something gross