This particular problem will only be exacerbated in small rural schools where classes are made up from more than one year group making sequential teaching difficult.

BBC: Historians split over Gove's curriculum plans

Successful teaching is very difficult to assess.

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Or, in the case of the late Jaime Escalante, since his skill at teaching calculus proved difficult to transfer to others, in the future the Escalantes of tomorrow will teach kids around the world who will get their instruction from Apple Inc.

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Changing who students fundamentally are may prove more difficult than teaching them a different way of looking at business strategy and market playing fields.

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With talent scouts constantly on the lookout for excellent individual performances, Development League team coaches often have a difficult time teaching unselfish, team-oriented basketball.

NPR: Almost-NBA Players Take Home Paltry Salaries

For one thing, it makes teaching in these schools really, really difficult and teacher turnover really, really high.

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Among my own pupils, the decision was particularly difficult, because the government provided stable teaching jobs if they remained in their hometowns.

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Mr Lightman also expressed concern that public sector pay rises would be capped at 1% for two years, saying this would make it difficult to attract high calibre candidates into teaching.

BBC: Autumn Statement: Nursery places plan for two-year-olds

After one of the most difficult years in our history, they remain busy building cars and teaching kids, starting businesses and going back to school.

WHITEHOUSE: The 2010 State of the Union Address

Few things are more difficult there than finding leaders with his humble demeanor and his preference for teaching by example.

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