Complex sentence: Based on the accountability ratings released by the Texas Education Agency on August 1,2006, Rolling Hills Elementary is currently rated "Academically Unacceptable" due to a low passing rate on the Mathematics portion of the test.
Split into simpler sentences: Based on the accountability ratings released by the Texas Education Agency on August 1,2006, Rolling Hills Elementary is currently rated "Academically Unacceptable". This is due to a lower than acceptable passing rate on the Mathematics portion of the test.