Dollars ≠ Scholars

VDOE has just posted Table 19 of the 2017 Superintendent’s Annual Report.  That table gives us, inter alia, the Average Annual Salaries for All Instructional Positions of each school division.

The spreadsheet tells us, “All Instructional Positions include classroom teachers, guidance counselors, librarians, technology instructors, principals, and assistant principals.”

Juxtaposing the Table 19 data against the 2017 SOL pass rates we obtain, for the reading tests:

image

The fitted line suggests that, among the Virginia divisions, $10K in higher average salary is associated with a 2% increase in the division average reading pass rate.  The R-squared, however, tells us that the two variables are only distantly related, with about 96% of the variance being explained by other variables.

Richmond is the gold square on the graph.  The peer jurisdictions from the left are Norfolk, Hampton, and Newport News.  Charles City is green; Lynchburg is blue.

The graphs for the other subjects tell much the same story.

image

image

image

image

Also the average of the five averages.

image

That high-performing division at a mere $43,006 is West Point.  The high performer paying almost twice as much, $78,350, is Falls Church.

Well, we knew that money can’t buy you love.  Looks like it doesn’t buy better division pass rates either.