How to make hair grow faster?

So my hair is kinda short (in my opinion) its about at where your torso and arm meet. but i want to be a lot longer so i can curl it and stuff. I have about 4 months until graduation. I was wondering what can i do to make my hair grow faster ? i dont currently have any split ends..
Btw i have naturally straight hair, so i don’t have to worry about burning it and what not.