Academic Archives of Yamaguchi Prefectural University Volume 19
published_at 2026-03-31
For this study text mining was conducted on commercially available math workbooks to compare vocabulary used in arithmetic word problems for lower elementary grades (Grades 1-2) and Grade 6. Analysis based on JLPT levels and textbook frequency showed that lower-grade problems mainly contained everyday vocabulary, whereas about 40% of Grade 6 vocabulary corresponded to N2–N3 levels, including abstract and subject-specific terms such as ratio, area, and relationship. These linguistic demands may hinder comprehension not only for non-Japanese students but also Japanese. The findings highlight the need for vocabulary support aligned with students’ Japanese proficiency in understanding math word problems for all students.