Some helpful resources
The World Atlas of Language Structures Online (This is a large database of structural properties of languages around the world gathered by many authors from descriptive materials)
Structure here means how words and phrases are sequenced to make up larger units of the language. In an English clause, for example, we typically find a noun as the subject followed by a verb, followed by another noun (object), so that the clause has the structure SVO. In Japanese, however, a clause typically has the structure SOV. Clause structure in Japanese is different from that in English- the elements come in a different order. (Reflection: Would this knowledge inform your grammar instruction?)
Watch "Why Grammar?" and reflect on whether you choose to be a prescriptivist or descriptivisit when it comes to grammar usage/grammar instruction.