Physicist Ian Graham, author of several books on HTML programming, offers a table of characters from the International Organization for Standardization to help you add Spanish language to your course web site using HTML codes. Ian's table is at:
http://www.utoronto.ca/webdocs/HTMLdocs/NewHTML/iso_table.html

Check out Ian's books on HTML at:
http://www.utoronto.ca/webdocs/HTMLdocs/NewHTML/book.html

Use Ian's table for writing HTML. However, when using a word processor or simple text editor, use the table given to us by our clients at Universidad Interamericana de Puerto Rico. You'll find it at http://www.futureu.com/stuff/. These will show up nicely in your document. However, they don't work well with HTML pages, so use Ian Graham's method for that.