FILE PHOTO: Teacher D. Laxman (2nd L) conducts lessons inside a bus which has been converted into a school called “School on Wheels” at a slum area in the southern Indian city of Hyderabad November 1, 2011. The mobile school, run by CLAP Foundation, a non-governmental organisation, brings education to the doorstep of disadvantaged children every day, halting for several hours at a time in different parts of the sprawling city. The children, whose parents are day labourers on construction sites, or work as rag pickers and maids, either never go to school or drop out once enrolled. Many have to work as hard as their parents to pay off family debts. REUTERS/Krishnendu Halder/File Photo