The KIPP schools have radically redesigned the school day and school week, extending hours and even the number of days that children attend school.

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Research shows that up to 40 percent of what children consume every day takes place during school hours and that 80 percent of children who were overweight between the ages of 10 to 15 were obese by age 25.

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Pupils in England should spend more hours at school each day and have shorter holidays, the Education Secretary Michael Gove has argued.

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Poorer children frequently have no one to look after them in the long hours between the end of the school day and the end of the average working day.

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One such child is eight-year-old Lucas Carleton from Liverpool who has been off school for nearly a year and can sleep up to 20 hours per day.

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And because her child may be spending several hours a day in school, she has time to organize or contact politicians.

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Also, children in regular schools in Korea are in school for up to 12 hours a day, with highly structured, large classrooms, and few opportunities for socialization.

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He wants the school day lengthened to seven hours for elementary children, for teachers to work 38 weeks a year, and to be able to introduce differentiated pay.

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In a few hours, my children will get up and get dressed for the first day of school.

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