罗斯蒙德说，低年级的标准是每天30分钟，四、五、六年级的标准是每天1小时。
Thirty minutes a day in the early elementary years and an hour in grades four, five, and six is standard, says Rosemond.
“我不建议家长检查每一项作业。” 《终结艰难的家庭作业》一书的作者、心理学家约翰·罗斯蒙德说。
"I wouldn't advise a parent to check every single assignment," says psychologist John Rosemond, author of Ending the Tough Homework.
柏林本名以色列。巴林﹐1888年出生于俄罗斯的小村子德蒙。
Irving Berlin was born Israel Baline in eighteen-eighty-eight in the Russian village of Temun.
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