Technology in Education: Pedagogical Innovations 4th International Conference, ICTE 2019, Guangzhou, China, March 15-17, 2019, Revised Selected Papers - Cheung, Simon K. S.; Cheung, Simon K. S.; Jiao, Jianli; Jiao, Jianli; Lee, Lap-Kei; Lee, Lap-Kei; Zhang, Xuebo; Zhang, Xuebo; Li, Kam Cheong; Li, Kam Cheong; Zhan, Zehui; Zhan, Zehui (Springer Singapore : Imprint: Springer, 2019)