She believes in searching more than she believes in attainment.
Crawford and Wang believe the slump in attainment can be put down to two factors.
The figures showed a widening gap in attainment by disadvantaged pupils and their peers.
But we can't just throw money at the problem and expect these differences in attainment to disappear.
"There are important lessons here for teachers and policymakers seeking to reduce the equity gap in attainment".
Almost all Shanghai pupils reach a similarly high standard and there are few gaps in achievement (unlike in England where there is a wide range in attainment).
"It is also important to note that the mechanisms underlying the improvements in attainment observed in the universal pilot are not clear," the report's authors concluded.
However, his behaviour on one of the most important days of the school timetable led to a fatal collapse in attainment.
And, in government, education has been a priority - tackling the stubborn gap in attainment between pupils from different backgrounds, and raising standards for all children.
But there's been quite a debate about why exactly the amazing story of London schooling has occurred, in particular the improvement in attainment among poorer children.
The gaps in attainment between children eligible for free school meals and the rest, which actually widened on the coalition's watch, will continue to yawn.
