Without the context of a full sentence I will say it depends.
I find it difficult to learn tenses in English grammar:
because it is English grammar in general.
The way I was taught the different tenses in the English grammar I was
taught at school isn't proving very effective:
because it is not English grammar in general but the particular grammar I was taught.
Note that not using the word "grammar" would not change anything, you can say "tenses in English" and everybody knows what it means.
No.
If there is a definite article in the title, you say it as part of the title:
Today, I would like to discuss The Bridge on the River Kwai with you.
However, if there isn't, you don't need to add one.
Today, I would like to discuss Kind Hearts and Coronets with you.
The only time you would see an added article would be if the film title is used as an adjective phrase modifying a noun that take an article. For example, you would say:
I have the soundtrack stuck in my head.
and:
I have the soundtrack to Kind Hearts and Coronets stuck in my head.
Therefore, if you use the title as an adjective phrase, you would also say:
I have the Kind Hearts and Coronets soundtrack stuck in my head.
But this is because "soundtrack" needs the article, not because the title does.
You should also be aware that, if there is an article in the title, when you use it as an adjective you would normally not repeat the adjective. So, for example, it would be more common to hear:
I have the Bridge on the River Kwai soundtrack stuck in my head.
than:
*I have the The Bridge on the River Kwai soundtrack stuck in my head.
Best Answer
The definite article is definitely NOT required, as stated by the previous commenter, and is actually more common and natural without it, i.e. Let's discuss Russian grammar. The use of the definite article here is not incorrect, however it is superfluous and awkward, at least to my ear.
In another context, one would say: I'm having trouble with Russian grammar. If one said the Russian grammar here, it would call to mind the grammar textbook, since this is also called a grammar.
Also note the following: Let's discuss...