Today i have a long in-my-mind question. A noun can be used as an adjective e.g. woman toilets, a flower shop. some words have its inflected form of noun making it adjective such as a colorful house, beautiful sunshine. in some case i doubt which word i should use noun or its inflected adjective such as education policy or educational policy, culture studies or cultural studies .
We do have adjectives womanly and flowery, which can be used to describe the appearance or characteristics of something. A flower shop doesn't have the appearance of flowers; it sells flowers, and a women's toilet is for women and like similar to them. A colourful house would be painted or made out of materials with lots of colours or bright ones, etc.
With your example, I would use education policy for the policies that guide the education system. An educational policy could teach you about anything- it could be health, for instance.