Secondary schools with full-time librarians had higher test scores

At the secondary level… Nine out of ten schools (over 90 percent) with full-time librarians had more students who earned proficient or above proficient test scores. Among [secondary] schools with only part-time librarians, almost seven out of ten (almost 70 percent) had more high-achievement students—a lower proportion than for schools with full-time librarians, but a higher one than for schools with no librarian at all. Among the latter group of schools [i.e., no librarian at all], only about half (just over 50 percent) had more high-achievement students.

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