Teachers can upload a document or PDF that they want to transform into an interactive activity for students. Then, on the document, the teacher can click on any part of the worksheet and make it interactive by adding in question prompts, hyperlinks, even videos!
As the teacher, you're able to distribute assignments to students, which could also entail entrance and exit tickets. If desired, point values can be assigned to questions.
The best part about Formative is that assessment results are available in real time. Students can type, show their work with drawings or submit images. Below you can see a sample screen of what a teacher might see as students are drawing an image in response to the proposed question about surface area:
As you're learning how to use the tool, know that Formative has a bank of tutorial videos that are quick and easy to follow. Check out their tutorial videos: http://community.goformative.com/videos.
Here is a quick 5 minute overview of Formative that will paint a clear picture of the application: