That has created a longer record of school performance.
"We're looking for outstanding practitioners who have a record of school improvement behind them," he says.
A DfE source said: "While he has a great record of school improvement, as soon as the extent of the breakdown of governance at Perry Beeches was identified it was clear that Liam would have to resign".
Until now, the record of schools succeeding in this area is not particularly good, and most university-generated intellectual property ends up sitting on shelves or not selling much.
Using student monitors is only one of many tactics upon which Benin's schools rely to turn around the dismal record of school attendance and completion.
Details are provided in Table 3, but these included: published literature, especially newspapers and advice manuals; local manuscript records of schooling, justice, government and philanthropy; census enumerators' books; and all surviving personal documents such as letters, diaries, autobiographies and oral histories.
In his research Booth drew on his own observations and those of clergymen of long service in their parishes, and he consulted records of schools and charitable organizations.
"We looked into the records of school building in the German federal state of Brandenburg in the 16th century, and discovered that there were disproportionately more girls in school than boys.
In addition, studies relying on official records of schools, police, or courts demonstrated higher effect sizes than studies using parent, teacher, or self-reports.
That's why our research team dedicated more than two years to mining hard-to-access data, including a half million state records, to study charter authorizers' records of school performance.
