So here are my attempts at getting more succinct:

IN A FEW SENTENCES
I’m writing about whether school librarian preparation programs require or offer coursework that prepares school librarians to serve students with disabilities successfully. I’m doing this by reviewing program websites to see what their requirements and offerings are and analyzing the course descriptions. I have found that school librarian preparation programs rarely require such coursework or even offer coursework that addresses serving students with disabilities in the school library context as opposed to the classroom. Such coursework is offered primarily in New York, where a federally-funded grant project was implemented to address these students’ needs in school libraries.

IN ONE SENTENCE
My article is about how school librarian preparation programs tend not to offer the coursework school librarians need to be prepared to serve students with disabilities, with the exception of programs in New York that are part of a federally-funded project designed to address this issue.