@article{{ER}{}, author = {Lien, V.}, title = { Assessing Collaborative Problem Solving Competency through Integrated Natural Science Teaching of the Topic “Nonmetals” in Chemistry 11}, journal = {VNU Journal of Science: Education Research}, volume = {34}, number = {3}, year = {2018}, doi = {10.25073/2588-1159/vnuer.4160}, url = {https://js.vnu.edu.vn/ER/article/view/4160} }