The NASUWT, Britain's second- largest teachers' union, takes cyber-bullying very seriously.

英国第二大教师联合会，非常重视网络攻击问题。

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The NASUWT questioned Labour's ability to deliver the 10, 000 new teachers it has pledged to employ.

BBC: Unions give verdict on manifesto

About 12, 000 teachers from across the UK responded to the questionnaire, the NASUWT says.

BBC: Teachers 'too scared to use the red card',

The NASUWT union said the approach was "politically motivated" and intended to promote so-called "academisation".

BBC: Primary classroom generic image