Figure 1. Component seal

From

Developing and Evaluating Elementary-Level Teaching Materials “Magnetic Top”: An Analysis of Questionnaire Using Text Mining

Takekuni Yamaoka, Kimihito Takeno, Shinichi Okino, Shinji Matsumoto

American Journal of Educational Research. 2017, 5(2), 189-195 doi:10.12691/education-5-2-13