div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: CHEN Yubei PAN Kaijuan SIGG Viviane-laure @ 2017 1pdf · CHEN Yubei PAN Kaijuan SIGG Viviane-laure @ 2017 The Active Classroom The Education University of Hong Kong Checkpoints src=https:reader033fdocumentsfrreader033viewer20220505015f93c8a60cee684e2b5fcf74html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divpCHEN Yubei PAN Kaijuan SIGG Viviane-laure @ 2017pdiv