On the assignments page you're able to see the "Status" and "Completed" score of your students listed. To see the more detailed statistics per students you will have to click on the students name.
We understand that this might be inconvenient when you want to check the progress for many different students. For this purpose we're thinking of making the analysis experience easier by for instance adding a progress export functionality in the near future. Until that has been implemented we unfortunately have to ask you to check the progress one student at a time.