In these two sentences, I'm not sure where to put the apostrophe to make it a plural possessive noun.

We were excited to see the (children) photographs.

The pictures looked like real (photographer) pictures.

childrens'

photographers'

Sra

I think Sra has a typo.

Since children is already plural, the possessive form is children's.

Absolutely right! Not fully awake! Thanks for catching it.

Sra

To make the noun "children" plural possessive in the first sentence, you would place the apostrophe after the "s" at the end of the word. The correct sentence would be:

We were excited to see the children's photographs.

To make the noun "photographer" plural possessive in the second sentence, you would first need to make the noun plural by adding an "s" to it. Then, you would place the apostrophe after the final "s" in the plural form. The correct sentence would be:

The pictures looked like real photographers' pictures.