Here's what appears to be the former school for Our Lady of Mount Carmel in Astoria:
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The news clipping I'm using notes that there was both a school and convent designed by William Boegel, and puts it in Long Island City. Despite the geographic differences between Long Island City and Astoria, this seems to be the school building from the newspaper clipping. The large white rectangle on the upper part of the building obscures the top of the cross that was a prominent feature of the original design.
The convent does not appear to be in existence anymore, although the quality of the news clipping makes it difficult to compare the convent against other buildings nearby the school.
The school is now the home of the Young Women's Leadership School of Astoria, a school for 6th-12th grade girls run by the NYC Department of Education.