Speaker
Description
Looking at textbook evaluation from a corpus linguistics perspective, this study examined the vocabulary in an international EFL textbook currently in use at a secondary school in Hanoi, Vietnam and measured the vocabulary knowledge of 150 high school students who were using this book in their English course. The corpus analysis showed that 2,000 word-families and 3,000 word-families were needed to reach 93% and 97% of the whole textbook corpus, respectively. Scores on Webb, Sasao, and Ballance’s (2017) Updated Vocabulary Levels Test revealed that the majority of the students had already mastered only the most frequent 1,000, but not the and 2,000 and 3,000 words, and thus would only be able to achieve adequate comprehension of the texts with the help of teachers.
