It wouldn’t stop a 0 from being entered as a grade — just not push that notification. This would actually makes teaching easier, as they can use a 0 as a place

It wouldn’t stop a 0 from being entered as a grade — just not push that notification. This would actually makes teaching easier, as they can use a 0 as a placeholder without having to decide about accidentally pushing a notification. I don’t think the teacher’s goal is to cause a panic with a transient 0 that’s later replaced — so I don’t see why they’d stop using something that better accomplished their goals.