Sir Michael was speaking at the annual conference of the Association of School and College Leaders.
This view is reflected by head teachers' organisations the Association of School and College Leaders.
College leaders must prune the dying parts to allow the young, growing buds to thrive.
Head teachers represented by the Association of School and College Leaders (ASCL) back the ending of the January exams.
The Association of School and College Leaders said the chancellor's autumn budget statement was "bad news indeed" for education.
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Brian Lightman, general secretary of the Association of School and College Leaders, cautioned against the over-simplified use of school performance data.
She told the Association of School and College Leaders conference she had been surprised that the complaints procedure was hardly used.
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The Association of School and College Leaders said Prof Wolf was right to identify "problems" with the use of non-GCSE equivalents.
Brian Lightman, leader of the Association of School and College Leaders (ASCL), emphasised the lack of enthusiasm for localised pay negotiations.
Brian Lightman, General Secretary of the Association of School and College Leaders, welcomed the pledge to involve teaching practitioners in the inquiry.
Dr John Dunford, general secretary of the Association of School and College Leaders, says they will "cease to take students through the answer".
Brian Lightman, general secretary of the Association of School and College leaders said that repeatedly changing the exam system was "unproductive and unhelpful".
"No head teacher takes the decision to close their school lightly, " said Brian Lightman, head of the Association of School and College Leaders.
Brian Lightman, general secretary of the Association of School and College Leaders (ASCL), said the statistics should encourage people to "ask more probing questions".
The head of the Association of School and College Leaders, John Dunford, said the government had warned that money would be tight this year.
Reaching that goal will take the commitment of everyone in this room, and all of the hardworking community college leaders, faculty and students you represent.
"Schools and college leaders have been very clear in their wish to retain a national system of pay and conditions for teachers, " said Mr Lightman.
But Labour says apprenticeships are increasingly being taken up by older people - and more effort should be put in to helping school and college leaders.
Martin Ward, deputy general secretary of the Association of School and College Leaders, said school and college leaders knew that exams in all subjects were not equal.
The Association of School and College Leaders has warned that confusion over its complex structure and a low take-up rate could doom the qualification to second-class status.
General secretary of the Association of School and College leaders, Brian Lightman, said he welcomed any move to give vocational qualifications the same status as other academic subjects.
The Association of School and College Leaders (ASCL) said the proposals would not improve social mobility and would have a "damaging effect" on pupils from the most deprived areas.
Brian Lightman, general secretary of the Association of School and College Leaders, said GCSEs needed to be reviewed but bringing back an O-level style exam was not the answer.
He warned that the series of events had led to "a profound crisis of confidence amongst school and college leaders, teachers, parents and students in our current examinations system".
Brian Lightman, general secretary of the Association of School and College Leaders, attacked the report as "simplistic" and being built on "false assertions" about levels of spending received by schools.
Mr Lightman, general secretary of the Association of School and College Leaders, said he had never heard of such a problem and doubted whether schools would behave in this way.
Mr Lightman, general secretary of the Association of School and College Leaders, said the rise in challenges to results was "no surprise" after the unresolved dispute over GCSE English grades.
Brian Lightman, of the Association of School and College Leaders (ASCL), whose annual conference opens on Friday, suggested that some schools might decide simply to do three A-levels and ignore AS-levels altogether.
Association of School and College Leaders general secretary Brian Lightman has predicted an increase in the number of schools who fail to meet their target of 40% of pupils obtaining five good GCSEs.
Association of School and College Leaders general secretary Brian Lightman said the report showed the importance of "ensuring that all young people are properly informed about the range of career routes open to them".
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