What is the subject in this sentence The new chemistry teacher at your school my cousin?

The subject of the sentence is "The new chemistry teacher at your school".

Here's why:

* Subject: The subject is the person or thing performing the action of the verb.

* Verb: The verb in this sentence is "is" (implied, as in "is my cousin").

* "My cousin" is the predicate nominative, which renames the subject.

Therefore, the subject is the entire phrase "The new chemistry teacher at your school".