Novel coronavirus pneumonia has changed the way of life of the whole nation since the end of 2019, and the traditional class-teaching of universities, middle schools and primary school have to be changed into online teaching. Online learning is a new thing for many teachers and students. In order to meet the new challenges, both teachers and students have t make some adjust?ments in teaching methods and learning strategies. In this process, problems arise unavoidably. This paper sorts out some problems and provides corresponding countermeasures.