I was a bit frustrated by the official courses only teaching one form of each verb (and the more so without telling which one it is). So I decided to build a course to learn the perfective and imperfective form of each of these verbs.
The first side is a Russian verb and the other side is the other form followed by " - св" or " - нсв" depending on if the verb to write is in perfective or imperfective form.
The verbs are the ones from the official courses.
For now, only Level 1 and 2 are finished. I plan to complete it in the following days