During schools' closure, due to the pandemic of COVID-19, teachers around the globe were forced to transfer their instruction on-line. They were facing a range of barriers and difficulties to plan and provide online remote teaching to their students. This paper reports on a study exploring Greek primary and secondary education teachers' views about emergency remote teaching and elearning. The survey conducted in May 2020, just after schools' reopening in Greece. A total of 694 K-12 teachers responded to an online questionnaire. The preliminary findings of data analysis showed that the majority of the participants perceived the pandemic as a turning point with regards to the role of digital technologies and e-learning in the schools. On the other hand, we identified teachers' needs for professional development and support, in terms of learning design abilities necessary to integrate synchronous and asynchronous learning in both, online and physical, classrooms.