Tibetan children posing for a portrait in Lhasa, Tibet.

Education, Science Class, Two students in uniform at desk examining contents of test tube with open exercise books, pens and pencils in front of them.

Education, Science Class, Two school girls in uniform at desk examining contents of test tube with open exercise books, pens and pencils in front of them.

Thailand, Sukhothai, Si Satchanalai, Girls wearing large painted masks to celebrate novice monks.

Spain, Catalonia, Barcelona, Wonkandy sweet shop in the Gothic Quarter. **Editorial Use Only**

Canada, Alberta, Lethbridge, A bare-shouldered young blonde Canadian girl sits to have the word CANADA painted on her face at Canada Day celebrations at Henderson Park, Face painter in a red T shirt h...

Nepal, Pokhara. Western children trekking in Himalayan Nepali hills near Pokhara.

Nepal, Pokhara. Young English girls trekking in Nepali Himalayan hills near Pokhara.

Nepal, Pokhara. Western family with children trekking in Nepali Himalayan hills near Pokhara.

Nepal, Pokhara. Western family with children resting during trek in Nepali Himalayan hills near Pokhara.

Bangladesh, Chittagong, Comilla, BRAC students in a primary classroom with peer marking.

Bangladesh, Chittagong, Comilla, BRAC students in a primary classroom.