To edit an assignment after it’s been assigned to your students, first log in to your Teacher Home Page, and click on the classroom with the assignment that you’d like to edit.
Then, find the assignment and click on the gear icon in the upper right-hand corner. From here, you can edit or add standards to the assignment as well as edit the students to which that assignment is assigned.
You can also edit the question parameters and schedule the assignment for now or at a later date. When you’re done editing the assignment, click the blue button that says Update to complete the process.