Stock Photo - Teaching staff take part in a rally of the Education and Science Workers' Union (GEW) which is calling on teachers to join warning strikes, in Berlin, Germany, 26 January 2016. The union calls for equal wages for every teacher in Berlin, regardless of their school and type of contract. Photo: WOLFGANG KUMM/dpa | usage worldwide. - Berlin/Berlin/Germany

Stock Photo: Teaching staff take part in a rally of the Education and Science Workers' Union (GEW) which is calling on teachers to join warning strikes, in Berlin,  Germany.

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