Your instructor will have to explain to you how to manage such differences to get a good grade on the print-out. If you use A4 paper as many countries do, the text will not wrap exactly the same since A4 paper is a bit narrower and taller than Letter paper. Fonts I have used only fonts that are included with Windows or with Word for the PC, but on your particular computer those may not be installed. If you use other fonts, the spacing of the text may change. You may not be using Word at all or not the same version of Word that I used.
Subtle differences can confuse things.
But the details are rather different and may catch you by surprise. If you are using a version for the Mac or Unix or some other operating system, there may be additional surprises. The directions in these lessons generally assume that the settings are left at the default - how Word looks and behaves just after it is installed. If your results are different from what the illustrations show, be sure that all of the settings in the dialog matched the settings on your computer. If you are using a computer in a classroom or computer lab, it is especially important that you check settings each time you use the computer.