Verso is a great app that offers formative data for teachers. It gives students a voice and allows them the opportunity to anonymously respond to prompts, articles, videos, etc, and then allows them to respond and rate each other's comments. The thing I like most about it is that it offers a voice to students that otherwise wouldn't necessarily participate in class, while also giving the teacher the ability to see who shared what (so it's not completely anonymous, which helps with extracting authentic responses, and makes grading easier).
Submitted by Mr. Bruno