The Assignment Activity allows students to submit work for teachers to grade and give feedback on. Student submissions appear on one screen together and you can require that they submit one or several files. Assignments also can have deadlines and cut off dates.
The Restricted Access setting is available for all resources and activities and allows instructors to make items available to students after they have met the restriction criteria. Restrictions can be based on date, performance or completion of an activity, or both. For example, an instructor could post a quiz for students to complete and then post an extra credit activity to be released only after students have completed the initial quiz.