Germany, Düsseldorf, Year 7, English classroom
England, Erith, Year 10, English
Qatar, Grade 10, Religion
Argentina, Buenos Aires, San Fernando, Year 3
Taiwan, Ruei Fang Township, Kindergarten, Art
The Netherlands, Rotterdam, Secondary Group 3, Motor Mechanics
Nigeria, Kano, Ooron Dutse, Senior Islamic Secondary Level 2, Social Studies
Peru, Tiracanchi, Secondary Grade 2, Mathematics
Holland, Drouwenermond, Primary Year 5, 6, 7 & 8, History
Yemen, Sanaa, Secondary Year 2, English
Cuba, Havana, Playa, Year 9
England, Bradford, Year 7, Art
Brazil, Belo Horizonte, Series 6, Mathematics
Saudi Arabia, Dammam, Kindergarden, Activities
Tokyo, Japan, Grade 5, Classical Japanese
USA, St Louis, Grade 4 & 5, Geography
Yemen, Manakha, Primary Year 2, Science Revision
England, Keighley, Year 6, History
Seems that the most accurate way to tell how old they are is to simply guess. :P
#9 - almost all blonds
#10 - no blonds
#16 - grades 4 & 5 and you have 16 and 17 years olds in class - that sounds about right