Noch de groepsgrootte noch het dagritme helpt het kind.

It means neither ... nor.

So:

• Noch de groepsgrootte noch het dagritme = neither the group size nor the daily rhythm
• helpt het kind = helps the child

A useful pattern is:

• Noch X noch Y + verb

This construction already makes the sentence negative, so you do not add niet.

This is a very common confusion for learners.

• nog usually means still, yet, another, or more
• noch means nor or appears in neither ... nor

So here, noch is the correct word because the sentence is coordinating two things in a negative way.

Compare:

• Ik werk nog. = I am still working.
• Noch Jan noch Marie komt. = Neither Jan nor Marie is coming.

So even though nog and noch look similar, they do very different jobs.

Because both nouns in the noch ... noch structure are singular:

• de groepsgrootte = singular
• het dagritme = singular

Dutch normally uses a singular verb here, just like English often does with neither ... nor when both items are singular.

So:

• Noch de groepsgrootte noch het dagritme helpt het kind.

The idea is: not the one, and not the other, helps the child.

If the coordinated nouns were plural, you would normally use a plural verb instead.

Because the entire phrase Noch de groepsgrootte noch het dagritme functions as the subject of the sentence.

In a Dutch main clause, the finite verb comes in the second position. The whole subject phrase counts as the first element, so the verb comes right after it:

• Noch de groepsgrootte noch het dagritme | helpt | het kind

So even though the subject is long, Dutch treats it as one unit.

Because Dutch nouns have grammatical gender, and that determines whether they take de or het.

Here:

• de groepsgrootte is a de-word
• het dagritme is a het-word
• het kind is a het-word

For compound nouns, the gender usually comes from the last part of the compound:

• groepsgrootte ends in grootte, and grootte is a de-word
• dagritme ends in ritme, and ritme is a het-word

That is why the articles are different.

Both are compound nouns, which are very common in Dutch.

• groepsgrootte = groep
  • linking s
    • grootte
      • literally: group size
• dagritme = dag
  • ritme
    • literally: day rhythm
    • in natural English: daily rhythm or daily routine

Seeing the parts can make long Dutch words much easier to understand.

Because noch ... noch already expresses negation by itself.

So Dutch does not say:

• Noch de groepsgrootte noch het dagritme helpt het kind niet.

That would be wrong here.

The negation is already built into noch ... noch, just like English neither ... nor does not need an extra not.

Yes, it is correct and normal, but it can sound a bit more formal or written than some everyday alternatives.

You will definitely see and hear it, especially in:

• formal speech
• writing
• journalism
• academic or professional contexts

In very casual spoken Dutch, people may prefer a looser structure, for example by splitting the idea into two parts. But noch ... noch is absolutely worth learning, because it is standard Dutch.

It is the direct object.

The subject is:

• Noch de groepsgrootte noch het dagritme

That is the thing performing the action of helpen.

The object is:

• het kind

That is the one receiving the help.

So the structure is:

• subject: Noch de groepsgrootte noch het dagritme
• verb: helpt
• object: het kind

Usually not in a short sentence like this.

So the normal version is:

• Noch de groepsgrootte noch het dagritme helpt het kind.

In longer or more complex sentences, you might occasionally see punctuation used for readability, but in a simple sentence like this, no comma is the standard choice.