How do I re-use a particular homework task I have set before for a different class?
Yes, this is possible in Milk. The first thing you must do is tick 'favourite' when setting the original homework task you might want to use again for a different class.
If you have already saved a past homework task in your favourites list, you can then find it and 'clone' it to be posted to a different class. Simply go to your homework list a click 'Favourites' and all your favourite homework tasks will be listed.
Then open the homework task you want to re-use and once inside the task, click 'Copy Homework'.
You will then see a screen with homework title prefix [Cloning]. From here you can edit your homework task title, choose the classes or individuals you want to re-use the homework for and set new Post and Due dates.