In Covid 19 pandemic, online teaching was not strange to us. In HCM city, when the pandemic happened complexly, almost schools were active in organizing online teaching with the purpose: "PAUSE TO SCHOOL, DO NOT STOP LEARNING". Online teaching still raises questions about the quality of teaching and learning. So how to implementing online teaching be both effective and excited for students to learn? It is not easy to teach online effectively when teachers only interact with students through computer and phone screens. This depends on many factors such as facilities, information technology skills of teachers, parental support, and online teaching orientation of each school. Organizing games during online lessons and through the Zoom software will help students interact with teachers, they can also be active, not passively sitting in front of computers or phones. In addition, it also helps children to be interested in learning and participating in the activities that the teacher requires. In the online classroom, the teacher's task is to gamify the content of her lecture knowledge, that is, to organize interactive game activities through applications and software to have an interesting teaching online hour. I apply interactive games through the software Class point is integrated into PowerPoint. Using technology devices to play and watch movies for kids is an extremely attractive thing. However, forcing children to sit in front of a computer screen to listen, take notes, and follow commands is a big challenge. Learning through games helps students absorb and remember knowledge more easily.