I did six peer assessments yesterday. They showed up on my dashboard as something I was supposed to do; three for two different prompts. There is a little, very simple practice set first, then you get the actual peer responses to assess. Note that in the prep questions, you only have to rate it 0 or 1, as they don't check your comments. I spent awhile wordsmithing my comments only to see, "Yes! You rated this a 1 and the actual rating is 1!"