De or het schoolomgeving?

The correct Dutch article is:

de schoolomgeving

Rule Words ending in -ing: almost always de. See the rule

How to use schoolomgeving

the schoolomgevingde schoolomgeving
this schoolomgevingdeze schoolomgeving
that schoolomgevingdie schoolomgeving
our schoolomgevingonze schoolomgeving
your schoolomgevingjouw schoolomgeving
every schoolomgevingelke schoolomgeving
which schoolomgeving?welke schoolomgeving?
a big schoolomgeving / the big schoolomgevingeen grote schoolomgeving, de grote schoolomgeving