In some cases, in-service teachers could broadcast their classes on the Internet, similar to the live broadcast classes in some apps. It depends on the policies of the institution and the school and whether they are allowed to do so. On some online education platforms such as Coursera, Udemy, and edX, many in-service teachers have already livestreamed their classes online and achieved good results. These platforms offer many courses for teachers and students to learn for free or pay. If in-service teachers wanted to broadcast their lessons online, they needed to find an online education platform and register as a user of the platform. They needed to ensure that their courses were authorized for online teaching and that they had the appropriate permission or approval. Although in-service teachers could broadcast their lessons online, they had to meet some conditions and requirements and ensure that their courses met the standards of online teaching.