Figure 1. Stages of the logical thinking

From

Building and Using Mathematical ¨C Biological Exercises for Developing Logical Thinking Competency for High School Students in Vietnam

Nguyen Thi Hang Nga, Phan Thi Thanh Hoi, Le Dinh Trung, Ha Van Dung

American Journal of Educational Research. 2018, 6(11), 1551-1557 doi:10.12691/education-6-11-14