I believe that the most effective way in a pandemic that has led to total online learning is to write essays and other scientific papers. Even if a student does not do the work completely independently, but orders, for example, it on one of the best services https://www.customessaymeister.com/custom-thesis-writing-service.html , he will still have to read the material. That is, the student in any case will do some work, and if this subject is difficult for him, then it will be a useful experience. Therefore, in conditions of quarantine, I think essays, abstracts and other works will help teachers in the best way to determine the level of knowledge of students.