As I was teaching French in US universities, I realized that many of my students didn't know much about grammar - they knew the rules of their languages as they were using it every day, but they were not able to explain them. I decided to build a simple reference sheet for them to use, so they would know the appropriate vocabulary to explain grammar. It has helped many of them, not only to better learn French and go beyond memorization but also to better understand how their own language works.
I wouldn't say that they appreciate our initial lesson on basic grammar, but they did appreciate its outcomes as it made the rest of our classes easier. If your students are especially struggling, the book "English Grammar for Students of French" is a great resource for both teachers and students.
A good exercise to make students review grammatical terms:
Give them a short (relatively easy) paragraph. Ask them to identify the grammatical class of each word, ask them to identify which words are grouped together to perform a single function in the sentence.
Here is the reference sheet that I give them (I also have a version of it with the terms in French for higher level students)
Grammatical classes, their function and use
the action made by the subject of the sentence
the subject and the time of the action determine its conjugation
word representing an abstract idea, a person, an animal, a thing ...
always requires an article (except for proper nouns/names)
introduces a noun
agrees in gender and number with the noun it refers to
Tied to the noun, expresses its quality, a relationship, etc.
agrees with the noun it qualifies
Replaces a noun to avoid repetition
agrees in gender and number with the noun it replaces
modifies a verb
links two words or two sentences
Introduces a complement
doesn't change (exception: au / de)
groups of words
most basic form: article + noun
can be exended with the following:
adjectives ( une maison rouge)
complements (Il roule avec un vélo de course).
relative clauses (Le voisin qui a un drôle de chapeau est venu ce matin.).
You will notice that these additions go after the noun they refer to