The only negative part is that you can only create an assignment/announcement from this extension for one class at a time. There are 2 workarounds though:
- From the extension, save the post as a draft. Then click view to open the post in Classroom and from the draft assign to the various classes.
- Post the assignment/announcement from the extension and then use the new reuse post feature in Classroom to re-post to multiple classes.
Here is a quick tutorial to show you how easy it is to use this extension.
So if you haven't tried this extension, I highly suggest you give it a try.