Welcome!!! I am not from Germany, but I love your country and your language. German is the third language that I use and German will be the third language that my LO will study.
I understand what you understand about screen, I put a post when I began to use LR, but I preferred the use of rational screen time for my baby. It has so many advantages!!!
Flashcards!!! I love flaschcards, I have more than 100 flaschcards at home. I want to give you a link, perhaps you know it, anyway, here you are:
http://www.mes-english.com/flashcards.phpEnjoy your teaching!!!