Use one of the following depending on the transcluding article. This will show all related articles while hiding the less relevant ones.
{{
WIAA Southwest Washington District 4|A|4A}}
for 4A Conferences{{
WIAA Southwest Washington District 4|B|1A}}
for 1A Conferences{{
WIAA Southwest Washington District 4|B|2B}}
for 2B Conferencesetc.