Thousands of teenagers in the region are getting their GCSE exam results.
Students in East Anglia and the North West had the third highest proportion of top grades in this year's GCSE results.
The Eastern region recorded 12% of A* grades, with the Eastern region accounting for 12% of this year's entries.
Entries from private school pupils made up 7% of this year's entries but accounted for 15.6% of A* and A grades nationally.
The state sector put forward 91.7% of entries and achieved 83.6% of A* and A grades
But teachers are reporting an unprecedented number of fails in English. Those who have already seen the marks complained of papers being downgraded.
It comes amid predictions that the pass rate across all subjects will start to stall.
The Association of School and College Leaders (ASCL) said there seemed to be a particular problem with C/D borderline grades in English, with pupils who were expecting Cs ending up with Ds.
Dozens of teachers voiced their concerns about the issue on the Times Educational Supplement's website last night.
Ofqual has told exam boards they will be asked to justify any results that are widely different to previous years in a bid to tackle grade inflation and ensure results are comparable.
The regulator has also previously expressed concerns about science GCSEs, and as a result, exams in the subject have been toughed up.
It was reported in June that Education Secretary Michael Gove was considering proposals to ditch GCSEs in favour of a return to O-level-style qualifications, with less able pupils taking simpler CSE-type exams.