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A refugee child learns numbers with the help of her teacher inside the Schisto refugee camp in Schisto, Greece on Oct. 4, 2018. World Teacher's Day is held annually on Oct. 5. (Xinhua/Lefteris Partsalis)
A refugee child learns numbers with the help of her teacher inside the Schisto refugee camp in Schisto, Greece on Oct. 4, 2018. World Teacher's Day is held annually on Oct. 5. (Xinhua/Lefteris Partsalis)