I think "idą" should be accepted too
While there are probably situations, where you are right, I think duolingo tries to teach that
chodzić- walk , go
iść - to be walking, to be going
So if we want to ask "do you walk to school" we use chodzić, but if we want to ask "are you walking to school (right now)" we use iść?
Yes, that's correct. Same goes for "go" - "Do you go" takes 'chodzić', "Are you going" takes 'iść'.
Okay, i did not get that one at all. What is this verb???
I wish it wouldn’t interpret certain crucial spelling differences as just typos. I wrote “One chodzi” and got “You have a typo.”
Yes, I also wish the algorithm would fail you on this, if you use another existent form... :/