The HTML tags are read by the browser and interpreted per the standards that have been set. An html document is simply a text file saved with the extension of html or htm. When you "view source" most likely it opens Notepad. You can save at that point, just make sure that you add the extension as I said. What you will need to do is 1) Create the document as assigned and copy to a disk for viewing by your instructor. If this is done on a school computer, just save it where you can find it. To display to the instructor, use Internet Explorer or Firefox or whatever browser is installed on the computer. If an image is included in the document, be sure that the image is in the same folder as the html document to keep it simple.
If you must upload onto the internet, then you will need an FTP program and someplace to which to upload. I assume that is not the case as it quickly gets rather advanced for a business class.
If you would like to learn more about HTML, I suggest you take a close look at http://www.w3schools.com/ The nice thing about this site is that there are sections that are interactive. You can change what is initially presented and then you can see what effects this has. Well, whether you want to learn more or not, take a look at this site.