opettavia
Opettavia is the present active participle form of the Finnish verb opettaa, which means to teach. In Finnish grammar, present active participles formed with the -va/-vä endings function as adjectives or non-finite verb forms that modify nouns. Opettavia is the plural partitive form used when the modified noun is in the partitive case, or in phrases where the noun is in partitive, such as teaching-related nouns.
Usage-wise, opettavia describes agents or activities that teach. It can refer to people who teach, as well
In practice, opettavia tends to appear in phrases where the noun it modifies is in partitive or
See also: Finnish grammar, present active participles, opettaa, opettaja.