Author: Willa Rubin

School buses idle in front of a school in Manhattan’s East Village on Jan. 15, 2013. Mario Tama/Getty Images hide caption toggle caption Mario Tama/Getty Images Catch up on what you missed with our Education newsletter, sent weekly. As the new school year kicks off, school districts are facing a challenging math problem: the high cost of diesel. The price of a gallon of diesel is up nearly $2 compared with this time last year. That is meaningful for schools, considering that around 90% of the United States’ 480,000 school buses run on diesel. Nationally, the average price was $5.62…