representing public schools

After police stations and fire stations, I am looking at *public schools.*


I could not find a property related to *accessibility*, e.g. wheelchair
accessible.

The school schema and its parents do not contain anything related to *grade*
level.
Here is a concrete example (my kids's school) where grade is described
using an enumeration "PK,0K,01,02,03,04,05,SE". (source=
https://www.schools.nyc.gov/schools/M185)
The closest is https://schema.org/educationalLevel, but this is not the
same.

What's the recommended way of capturing this info?

-- 
Arnaud