Assignments need a Preview to see student view

[dsblank]

Currently (as far as I understand), seeing what the student will see requires:

1. editing nbgrader_config.py, c.NbGrader.db_assignments
2. assigned
3. released
4. possibly switching course_id by editing nbgrader_config.py
5. fetched
6. open up copied notebook
7. save and close

If a mistake is found, then you have to repeat the steps (using --force) to re-release them. There are lots of mistakes I often make:

• wrong cell type (markdown vs code) for autograded cell
• wrong number of points
• mistyped delimiter
• unused/duplicated name of autograded cell
• missing section (Reflections, for example)
• general typo
• due date

It would be easier if there were a "Preview" button that went directly to step 6.

[jhamrick]

To see what the student will see in terms of the entire workflow, then yes, you'd need to do all that -- but what it sounds like your asking for is just to see the version of the notebook that students see. If that's what you want, you can remove steps 3-7 -- the student version is the release version, so if you open up the notebooks in the release folder, you'll see the version that students see.

[jhamrick]

I think this is actually implemented now in the formgrader interface (#782), as there is a "preview" button you can click (though you still have to go through the "assign" step).