Posts Module - filter child pages of a specific parent

Hi, I want to be able to use the posts module & filter only pages with a common parent.

For example, I have parent pages called ‘Educational’, ‘Community’, and ‘Residential’ and I want to be able to select all child pages of ‘Educational’.

I could manually add custom fields with a meta-key on each page but that adds a lot of work that could be simplified if I can use post_parent somehow…