The keyword term "patriot day for 1st grade" functions as a noun phrase. The core of the phrase is the proper noun "Patriot Day," which is being modified by the prepositional phrase "for 1st grade."
In a grammatical breakdown, "Patriot Day" is a compound noun that names a specific day of observance. The preposition "for" introduces the phrase "1st grade," which acts as an adjectival phrase. This adjectival phrase modifies the noun "Patriot Day" by specifying the intended context or audience for the topic. The entire construction, therefore, names a specific concept: the subject of Patriot Day as adapted for a particular educational level.
Understanding this term as a noun phrase is crucial because it establishes the article's main point as a specific subject or topic. The article is not about an action (verb) or a description (adjective) but is focused on defining, explaining, or providing resources for the concept of Patriot Day tailored for first-grade students.