All u have to do is just look at your notes the teacher gave u and make a good introduction with it, but first u have to make a hook, a hook is something that catches things, like a hook catches fish, u are going to need a grammar hook, to reel in your audience to draw their attention to your essay or etc to make them read it, then your gonna need a topic, to tell people what its gonna be about, and u are also gonna need to tell them the main idea of it as well.