Unfortunately Google has removed this feature, we are looking at ways to implement this again however it is currently not possible.
ah, so that's why you have the import by dates... I was unable to import my whole classroom because it has more than 150 assignments. That topic feature was perfect since I'm elementary and I could import each topic and have a grade. I'm going to rethink next year's build on classroom so I can get around this.
@Deborah Manis We liked the import by topic as well, you should be already subscribed to this thread so I will reply here if we are able to add this feature again.
@Deborah Manis Good news, import by topics is back! Please make sure you have v2.35