Identify the noun clause in the following sentence: What they should do is hire a tutor who can help them with their math skills.

The noun clause in this sentence is the subject of the verb, "is."

What do you think the noun clause is?

That's an awkward sentence.

The main verb in that sentence is "is" and rest of the predicate is this: "hire a tutor who can help them with their math skills."

What's left?

To identify the noun clause in the sentence, we need to look for a clause that functions as a noun within the sentence.

The noun clause in the sentence is "What they should do."

To arrive at this answer, we can break down the sentence:
- The sentence begins with the question word "What," which suggests that a clause is following.
- "What they should do" acts as the subject of the main verb "is hire," and it can stand alone as a question: "What should they do?"
- The clause "What they should do" functions as a noun in the sentence since it is the subject of the verb "is hire."

Therefore, the noun clause in the sentence is "What they should do."