Simply create two IF tests, coded along the lines of:
{IF{MERGEFIELD Subject}= "Art and Design" "Art and Design text"}
{IF{MERGEFIELD Subject}= "Performing Arts" "Performing Arts text"}
or:

{IF«Subject»= "Art and Design" "Art and Design text"}
{IF«Subject»= "Performing Arts" "Performing Arts text"}

Note: The field brace pairs (i.e. '{ }') for the above example are all created in the document itself, via Ctrl-F9 (Cmd-F9 on a Mac); you can't simply type them or copy & paste them from this message. Nor is it practical to add them via any of the standard Word dialogues. Likewise, you can't type or copy & paste the chevrons (i.e. '« »') - they're part of the actual mergefields, which you can insert from the 'Insert Merge Field' dropdown. The spaces represented in the field construction are all required.


For mailmerges, you use a mailmerge main document, not a template. Executing the merge produces whatever output (email, printout, or document) you require.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]