Is in the study hall procedures an adjective phrase?

No, "in the study hall procedures" is not an adjective phrase. Here's why:

* Adjective phrases modify nouns. They tell us more about the noun they describe.

* This phrase acts as a prepositional phrase. It starts with a preposition ("in") and modifies the noun "procedures."

Here's how you could break down the phrase:

* Preposition: "in"

* Object of the preposition: "the study hall procedures"

* Noun: "procedures"

* Adjectives: "the," "study hall"

Example of an adjective phrase:

* The very large book (modifies the noun "book")

Let me know if you have any other phrases you'd like to analyze!