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The Spache readability formula is a readability test for writing in English, designed by George Spache. It works best on texts that are for children up to fourth grade. For older children, the Dale–Chall readability formula is more appropriate. It was introduced in 1952 in Spache's "A new readability formula for primary-grade reading materials," (''The Elementary School Journal'', 53, 410–413), and has subsequently been revised. ==Calculation== The method compares words in a text to a set list of everyday words. The number of words per sentence and the percentage of unfamiliar words determine the reading age. The original formula was: : The revised formula is: : 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spache readability formula」の詳細全文を読む スポンサード リンク
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