– Frequency of lessons
Every lesson begins with a revision of material from previous lessons. The more often you take lessons, the better you remember the revised material, and the less repetition you need. If you do less repetition, you have more time for new work and you progress faster.
– Connection quality
It’s very important that your tutors and you can hear each other clearly. You need to learn correct pronunciation from them, and they need to correct any mistakes that you make. Your tutor and you will speak simultaneously a lot of the time, so it’s important that there is no lag. If there are sound issues, your lessons will be less efficient and your progress will be slower.
Between lessons, you will be able to do exercises that will help you revise on your own as well as practice spelling. If you do these exercises regularly, you will remember previous lessons better and need less repetition.