The 2011 database is now in the data-viewer (thoroughly cleaned)
It’s also the data-viewer‘s default database. A lot of effort has gone into cleaning the 2011 data – combatting a trend whereby an annoying but growing minority of students is entering silly values. In preparation for the 2013 survey, we will have a dialogue with teachers later in the year about how this trend might be reversed. The 2011 database is currently the cleanest of the databases.