The 2010 survey was conducted as part of a collaborative project by The Children's Society and the University of York. Data were gathered from just under 5,500 children aged 8-15, in school years 4, 6, 8 and 10, via surveys conducted in schools in England. The survey was part of an ongoing research programme, the aims of which were (a) to develop a better understanding of the concept of well-being as it relates to children, taking full account of the perspectives of children themselves; (b) to develop and validate self-report measures of children's well-being; and (c) to use these measures to identify the reasons for variations in children's subjective well-being and to monitor trends over time. The first survey in the series covered 10-15 year olds and was conducted in 2008 (see SN 7898), and a later survey was conducted in 2013-2014 (SN 7910). The 2010 survey was used to compile the Children's Society's 'Good Childhood' 2012 report. The 2010 survey was administered using online questionnaires. In total, three questionnaires were used; one for the year 4 students, and two for the years 6, 8 and 10 students.