The social changes and impact that the twenty first century has brought are quite different from the past; the only approach to help future citizens survive in a fast changing world is to revising traditional curriculum, instruction and assessment framework. To this end, relevant recommendations conducted by the United States‘ The Partnership for 21st Century Skills, The Next Generation Science Standards (NGSS), and other similar projects are focus on the developing of students’ high order thinking and complex communicating skills. In accordance with the need of next generation skills, Argumentation, which helping to understand how well an individuals’ thinking processes, ways of thinking and communication skills are working, is the process of making claims or conclusions by using evidence to support or oppose specific comments. In the study, we will apply the peer assessments to the training in the International Young Physicists‘ Tournament (IYPT). In addition to the helpfulness of the performance of students engaging in the IYPT, our results could provide valuable insights into the mechanism required in the instruction, learning, and assessment of the next generation science education.