Findings from a TES poll south of the border show that almost four out of five heads want centrally imposed targets to be abandoned because they are driving out creativity.
More than three-quarters of heads say that while targets may have brought better test scores, they have not brought genuine improvements in learning.
Instead, they have sidelined the arts, humanities and sport.
More than half of heads believe too little time is devoted to art, design, technology and music.
Just six of the 400 heads surveyed felt they gave every subject about the right amount of time.
The poll shows a massive vote of no confidence in Tony Blair's policy of using targets to lever up school standards.