What are repetitions and drills?

Upon entering a course, at the top of the screen you will see three symbols. From the left: repeat, learn, drill.

Repetitions (also called intelligent repetitions) are small portions of the course material that you repeat at an optimal moment, chosen by the SuperMemo algorithm. You repeat the material just when you're about to forget it, which ultimately makes learning with SuperMemo so effective.

Drills appear with words and phrases where you click "I don't know" or "Almost." This way, after familiarizing yourself with new words or going through a session of repetitions, you can return to the material that you don't completely remember and reinforce it in your memory.