Duolingo should teach katakana too, as it is used side-by-side with hiragana.
It's in there - just mixed up and not isolated as Hiragana is.
They do, it’s just more spread out than the Hiragana.
What lesson are you on now?
They start Katakana with the Intro lesson.
I agree. They should do with katakana as they did with hiragana. I knew them coming here since I did lessons prior, but for someone who hasn't I reckon it can be a bit confusing.