eng Science and Education Publishing American Journal of Educational Research 2327-6150 2018-11-26 6 11 1551 1557 10.12691/education-6-11-14 EDUCATION201861114 article Nguyen Thi Hang Nga 1 Phan Thi Thanh Hoi hoiptt@hnue.edu.vn 1 Le Dinh Trung 1 Ha Van Dung 2 Faculty of Biology, Hanoi National University of Education, Hanoi, Vietnam Journal of Education, Hanoi, Vietnam Paralleling to the reform of the general education curriculum oriented to learners' competency development in Vietnam is the innovation of teaching methods. The transfer from content-based teaching to competency approach is a difficult task for high school teachers in Vietnam. The purpose of this study is to design a process for the development and use of mathematical-biological exercises in the development of logical thinking competency for high school students in Vietnam. In the article, based on the study on thinking, logical thinking, definition of logical thinking competency, we define the structure of logical thinking competency of high school students as well as build mathematical-biological exercises model and process of mathematical-biological exercises design. From there, we propose the process of using mathematical-biological exercises to develop students' logical thinking competency. http://pubs.sciepub.com/education/6/11/14/education-6-11-14.pdf logical thinking logical thinking competency mathematical exercises mathematical exercise model mathematical-biological exercises