著者

長谷川 修治 中條 清美

出版者

外国語教育メディア学会

雑誌

Language Education & Technology (ISSN:04587332)

巻号頁・発行日

no.41, pp.141-155, 2004-06

被引用文献数

9

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Junior and senior high school (JSH) English textbooks in Japan are written in accordance with the Course of Study guidelines provided by the Ministry of Education, Science. and Culture: these guidelines are revised about every ten years. In this study we examined the vocabulary of three sets of serial JSH textbooks, each of which was written in the 1980s, and then re-written in the 90s and again in the 2000s based on the revised Course of Study guidelines for each decade. The purpose of this study was to in vestigate both the alteration in vocabulary size and the efficacy of the three serial JSH textbook vocabularies. The study found that the number of types within JSH textbook vocabulary in the 2000s was larger than that of the 1980s and 90s. On the other hand, the amount of tokens in the 2000 set was the lowest of the three serials. This means that the number of repetitions of exposure to words used in the 2000s version textbook was the lowest of the three. The study also found that the efficacy of the JSH textbook vocabulary gradually improved each time A Gourse of Study was revised, although the overall JSH text coverage over the vocabulary of practical activities remained insufficient.