Corona Virus Disease 2019 (COVID-19) has been declared by WHO as a pandemic and the Government of Indonesia based on Presidential Decree No.11 of 2020 concerning Determination of Public Health Emergencies. COVID-19 is a public health emergency that requires efforts to overcome it. In the education sector, the Covid-19 pandemic has accelerated education 4.0 with a distance learning system by utilizing information technology. In the education sector, teaching and learning activities, which usually take place face-to-face /offline, this time must be done online. The research aims to analyze the application of online learning at the Agricultural Development Polytechnic (Polbangtan) Malang and student learning activities in the application of online learning both from the aspects of independence and the development of critical thinking. The research method used is a mixed-method (mixing method). A qualitative approach is used to determine the implementation of online learning. A quantitative approach is used to determine student activities in online learning. The sample in this study were 105 students. This research was conducted in the Citizenship course. The results showed that the implementation of online learning at Polbangtan Malang was carried out through various platforms such as Google Classroom, LMS Moodle, WhatsApp, Gmail, and YouTube. In its application, there are several obstacles and problems faced by students such as internet network factors, internet quotas, and learning platforms that have not been mastered. Students in online learning activities are classified as very good in the interval X ≥ 11.7, the level of independent learning and critical thinking of students is also classified as very good. The findings above indicate that student learning activities in the Citizenship course are classified as very good even though they are carried out online. The application of online learning must pay attention to several factors of constraints and problems faced by students. With these findings, the application of online learning in the future can be carried out wisely by paying attention to the effectiveness of activities, the efficiency of internet quota, and the substance of the material being taught.