Among the "learning" points in their conclusion was the revelation that schools could "change the type of pupils" they admit.
"These calculations are made only for those in the state sector, yet the presence of grammar schools changes the type of pupils in private schools," she said.
The analysis of how they have progressed in 1,861 schools in England gave an insight into the type of pupils who were more likely to find maths very difficult.
Consequently there will be only certain types of pupils they want to go there too.
More demanding performance measures and a fragmented school landscape are, they believe, increasing the risk of covert selection and the exclusion of certain types of pupils to help schools climb the league tables.
Thus both types of pupils imitate their tutor's song motif nearly equally well.
As shown in Table 1, the 17 schools varied in geographic location, school type, number of pupils and their grade-levels, socioeconomic status (based on parental income), square meters of schoolyard per child, recess rules and number of play facilities.
In each school, the number and type of disability of pupils are indicated.
Box 1 Impact of the type of activity on pupils' motivation 'If it's Wednesday it's not too bad cos I've got something I like…but if it's athletics I'm like 'OMG' [Oh My God] cos I'm rubbish at it.
