The outbreak of COVID-19 happened suddenly. Consequently, educators were forced to provide online teaching during the 2020 school year. This caused several issues. First, teachers were not prepared to film themselves or change face-to-face class presentations into online videos. Web applications, such as Zoom or Google Meet, provided teachers with an alternative way to communicate with their students simultaneously. Students had to learn how to access the online materials, use digital devices, and secure strong internet connections. Moreover, attending school online prohibited college freshmen and first graders from making new friends or getting accustomed to the educational system. These challenges have widened the educational gap between the students that had previously learned in a traditional classroom and those that had to learn online during the pandemic. Thus, the educational body of Korea and students face the issue of "catching up" with academic achievements. This paper presents the results of several interviews conducted with teachers and students to obtain their perceptions and identify the challenges in online education.