Lessons vocab

I am only on challenge 11 level 1 and I have noticed that in some lessons it would ask me to say something with a word in it that they have never taught me before and never touch on it again. Does anyone know why

It’s just another way of creating pathways in the brain. The word may well appear again, but by that time you’ll probably have forgotten that it was one introduced in this way. It’s a very natural/organic way of learning words and in the long term it works far better than memorising from a list.

oh ok, diolch yn fawr