Complex sentence: The highest achieving students do an English Baccalaureate (EBacc) while the lower do regular GCSEs and/or BTECs at Key Stage 4 as of September 2012.
Split into simpler sentences: The highest achieving students do an English Baccalaureate (EBacc). The lower do regular GCSEs and/or BTECs at Key Stage 4 as of September 2012.