In this instance, both endorsed and non-endorsed librarians were positively correlated with advanced CSAP reading scores and negatively correlated with unsatisfactory scores. In other words, with poverty utilized as a control variable, both endorsed and non-endorsed librarians had positive and statistically significant correlations with reading scores. Notably, however, these relationships are stronger for endorsed librarians than non-endorsed ones. What did not change was the lack of relationship between non-endorsed library assistants working without a librarian and reading scores. Apparently, library assistants working without supervision do not have any impact on reading scores, either advanced or unsatisfactory.