Professionals agree the system is not perfect but not many of them welcome criticism or ideas from outside, whether those come from politicians without a teaching qualification or an external appointee to head the ministry. In the year since Ms Longstone was installed she, as much as the minister Hekia Perata, has argued for an increase in class sizes and a thorough re-organisation of schools in Christchurch.
She has also been obliged to put national standards into force and develop legislation for charter schools. She has not offered personal views of these policies but greeted them with a more open mind than the teachers' organisations possess. For that, they treat her with suspicion.
It is rare to have one of our largest state services headed by a newcomer to the country and we should make the most of it. If Ms Longstone finds our education system less than world class in any respect, we need to hear it. The criticism she has received is a measure of the complacency she is facing.
Reading the ministry's goal statement, we may have supposed we already have a "world-leading eduction system" that needs to do more for Maori and Pacific children. Until it does so, she says, it is not world-leading, it is not even world class.
We need to hear how the most successful multi-ethnic nations ensure all minorities are well educated. It may be that our schools have been too much the same. In the report the secretary also says we do well for top learners and our average child performs well. It is those below the average who must be doing better elsewhere.
The "tail", as our education policy makers call them, is not a new concern. We were unaware we lagged the world in this regard but we should not blame the messenger for this knowledge. In stating it, she is doing well.