After you have assigned lessons, you will want to follow their progress and know what is completed and what needs feedback from you.
To do so, you will go to the class assignments page, and from there you can filter any assignment by the status of the different students that received the assignment.
If you want to know what student work needs feedback, you just click on "Needs grading" in the status filter and you will get a list of only the assignments where at least one student has submitted their writing and needs your input.
The filter also shows you how many assignments have at least one student in each of the statuses.
You can also focus only on what is in progress, leaving out the assignments that were fully completed by choosing the correct filter.