This week, I've started using Seesaw in a few of my classes. One of our other teachers used it a bit last semester and really liked it, so I wanted to give it a try. So far I really like it.
Seesaw is a digital portfolio of sorts. I've been using it as a way to do formative assessments with Exit Tickets and such. It's been great for students to take photos of their work or videos of different concepts. It's also been great for me to document what the students are doing in class. When I take photos, I can put them into the class feed (which is like a Snapchat story or Facebook stream), and I have instant documentation.
I wish Seesaw had a way for PDFs to be put in and for students to write on them. I'd love to be able to have the versatility of Notability, and the organization of Handouts or Skaffl. This would be a great way to go paperless in a classroom.