Template:School districts (dis)established in the YYY0s category header/doc

 is used to create categories of the form "School districts established in the YYY0s" or "School districts disestablished in the YYY0s", where YYY0s is a 4-digit decade.

e.g. Category:School districts established in the 1980s or Category:School districts disestablished in the 2010s

Usage
No parameters are needed.