Stephanie Banchero and Darnell Little:

irls in Illinois grade schools outperformed boys on every state achievement exam last school year, according to a Tribune analysis, a twist in performance that has perplexed state officials and educators across the state.
Historically, girls have scored higher than boys in reading and writing, while boys did better on the science and some of the math exams.
But while Illinois’ boys showed modest increases in most subjects and grades in recent years, girls have progressed much more rapidly, according to the 2007 Illinois State Report Card data made public Wednesday.