These are the actual physical paper post-its. We used this app to collect thoughts by teachers at the NE Oregon Regional EdTech Cadre about coding in schools.
Lots of conversation grew from this as to how to use this app in the classroom. Most common was the comment of how this would be great for a single iPad classroom. Capture brainstorming, vocabulary, exit tickets, etc... Teachers could use it for later evaluation or in class to project for the whole class to see and help group.