A 2014 poll of teachers, carried out by Teacher Support Network, revealed that over 90% of teachers felt Ofsted inspections had a neutral or negative impact on students' results. In response to criticisms about the increased workload inspection frameworks caused, Ofsted pledged it would not change its inspection framework during the school year. Wilshaw also dismissed speculation that Ofsted itself was responsible for teachers' heavy workload (in excess of 60 hours per week) describing it as 'a red herring'. However, a 2015 poll by the NUT found that 53% of teachers were planning to leave teaching by 2017, with the extra workload from Ofsted's 'accountability agenda' a key factor in seeking a job with a better work/life balance.