There's no widely known information about a specific "Alma Park Primary School" having a single, easily definable prior use before becoming a school. Many schools are built on land that had various previous uses (farmland, residential properties, etc.) To find out the history of a *specific* Alma Park Primary School's site, you'd need to provide more details like:
* Location: (City, state/province, country) There may be multiple schools with similar names.
* Local historical society: Contacting the local historical society for the area where the school is located is likely to yield the most accurate information.
Without this specific information, it's impossible to answer your question.