Since a VOM (analog volt-ohm meter) or DVOM (digital VOM) is probably the most basic test instrument - why not just a paper on it's theory of operation?
1) How does it measure voltage?
2) How does it measure resistance?
3) How does it detect the current flow? (the meter goes +/- based on where you put the red and black leads)
Here is the link to the Wikipedia page for Multimeters
That should easily give you two pages for your paper.