The decision follows a call from all nine of the county's MPs to resign after a damning inspection by the schools watchdog, Ofsted.
Norfolk County Council says Ms Christensen is taking early retirement and will receive only her contractual entitlement. She will receive two months’ gross salary in lieu of notice - £23,248.
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More funnel clouds have been spotted spinning down from thunderstorm clouds across the Anglia region as the June summer soaking continues.
Some sunny spells for much of the day with scattered, locally heavy showers, mainly in the east. Cloud increasing from the west later.