In the last two lessons, we talked about what to write. In this lesson, we'll talk about what to write on. Obviously, you can write on a sheet of paper with a pen or pencil. But handwriting can be hard to read. Or you could write on a typewriter. But typewriters are practically obsolete. The easiest way to write is on a computer. Your work will look better. Your teachers will have an easier time reading it. And they will probably give you a better grade.
Since you are reading this online, you obviously have access to a computer. And it probably has a word processing program. Since we don't know what kind of program you have, it would be silly for us to try and give you specific instructions. Besides, you probably already know how to use it. So we'll just remind you of the basic things most word processing programs can do.