Hi Class, I have received a number of emails from you; I will attempt to be brief and convey my thoughts clearly:

We have only two more formal class periods. The rest of the semester is “finals” and we don’t have a final exam in this class.

I am willing to make tomorrow’s class “last chance day for Unit 3.” Maybe your Presentation was not as comprehensive as you would have liked — and you thought of something you would like to add; maybe you did not complete both of the “Library Pairs” and you want the link again and more time to complete them; maybe you didn’t even Present at all. 

Let me know tomorrow, during class. I am receptive to work being made up on a case-by-case basis. There will be grading penalties for lateness if you have not presented until now, but late is way better than not at all.