I would lead the user by examples how to "convert" or do some word-like one-pager in LaTeX.
Page 1: LaTeX in a nutshell (it is a compiler, you need a distro, how to run a short hello world.), and an explanation what the following page 2 is all about.
Page 2: A figure of a typical Word/Office page, actually made in such a program. Should include the most basic things users want to do: Lorem Ipsum Text, Headlines/Subheadlines, Bold/Italic text, color text, a short numeric list, a short bullet list, embedded image, small table, a not too complicated formular.
Page 3+4: A double page focusing on explaining how text/paragraphs/headlines work, with two columns on the left side: first column with explanatory text how to convert the word-like text from page 2 into LaTeX, column two the resulting LaTeX source (maybe shortened with "..."). The right side shows the final renered LaTeX page so far. The advanced topics (lists, tables, ...) are not yet adressed and placeholders used in the example.
Page 5+6: Like pages 3+4, but focusing on one other element, like how to do bold/italic/color text. Again: one column explanation, one column example LaTeX output, one page the now improved page from the previous doublepage with the untouched topics still as placeholders.
Page 7+8: Another double page, this time focusing on explaining lists.
Page 9+10: Another double page, this time focusing on simple tables.
... and so forth, until the example page gets more and more sophisticated and the 20-page limit is reached.
Each double page therefor is a small mini-tutorial by itself.
Last page should be a "further reading" with pointers to where to find more advanced information, somehow grouped, e.g. like "more on figures", "more on tables", ...
\\) and a paragraph (empty line): The first doesn't bear any content but is a mere tool of typesetting, while the latter actually implies a unit of meaning and content. If you get people started in this spirit, they'll end up as good LaTeXies:)– doncherry May 20 '12 at 14:22If $x$ $+$ 2 $<$ 5which is bad because the spacing is wrong, the font can be wrong, and it takes more effort to type, anyway – make sure you explain that math mode goes around the whole formula. – Sophie Alpert May 20 '12 at 16:28