In the comparison with a stable study time, wherein Efficiency, a word study book are arranged to prevent phenomenon from declining. One learning Content of the studied word new about one is written in a top of one first type, studies surface (1A). Surface is studied in the first type, that writes blank is formed in research column, in order to write a word, when a learner sees word. First type on research surface is successively included the quantity quantitative approach column as the writing blank for being greater than each. The Second Type for studying surface includes a research column same type, as the first type research surface. Blank is individually write for the one of inspection and is included in Second Type, studies surface. Third type study surface includes a research column same type, as the first type research surface. Blank, which is write, for the one of review is included in third type study surface.
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