Teachers have to perform multiple roles like academic facilitators, transmitters of knowledge, organizers, and guides. In order to enable teachers to meet these professional expectations, concerned stakeholders work hard to design teachers' training course design, exposure about pedagogical practices is given, updation of knowledge and skills is ensured through in-service teacher training programs. In-service teacher training help teachers to evolve and adapt to the fast-changing global scenario. The spread of the COVID 19 virus forced educators to design and opt for online ways of fostering the professional capabilities of teachers to enable them to get connected to their students through various online modes. The present study focuses on the need and ways of online training for teachers so that they can reduce the learning deficit caused due to corona pandemic. The factors like course design, mode of transaction, hours spent, degree of participation, the competence of teacher educators, exposure, and expertise to use technology add to the effectiveness of any online program. An effective online teacher training program brings desirable behavioral changes in terms of knowledge, skills, and beliefs of the participants.