I would like to find a short poem by a woman poet that is appropriate for a nine year boy to read in class.
Answer
College of the Mainland has three books of children’s poetry that are at least partially written by women. Click on the titles to view their item records:
There are also places online where you can find poetry appropriate for children. I was able to find some by searching in Google for short poetry for children. The following links contain poetry for children, and at least some of the poems on each site are identified as being authored by women:

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