Complex sentence: Leechburg Area School District was ranked 412th out of 498 Pennsylvania school districts in 2013 by the "Pittsburgh Business Times", based on the last three years of student academic performance on the PSSAs for: math, reading, writing and science.
Split into simpler sentences: Leechburg Area School District was ranked 412th out of 498 Pennsylvania school districts in 2013 by the Pittsburgh Business Times. The ranking was based on the last three years of student academic performance on the PSSAs for: math, reading, writing and science.