The above link did not work, but after a while I figured out how to recover deleted assignments.
Go to History under your account
Then click on the one you deleted
Look at the URL it will say something like this: https://instructure.com/courses/2243/assignments
What you have to do is click enter on the URL and delete the word "assignment" at the end and replace it with undelete. It should look like this: https://instructure.com/courses/2243/undelete
It will then take you to all of your most recent deleted assignments, choose the one you need restored and click it.
I hope this helped some of you. I do not know if the set up changes depending on the district or maybe the type of device that you use, but just in case I am using a lap top HP ProBook model.
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