If the assignments are posted in your classroom, take a photo.
But don't forget to plug in the due dates etc. to whatever app you're using to stay on top of them. I put mine on a big wall calendar that lets me plan ahead.
When you're in a hurry and/or doing something else in class, why waste your time writing the information?
Makes you wonder why more teachers don't get this. Also makes you appreciate the ones who post the information online.
Because if you've ever had a teacher who passed out a calendar while saying it was already out of date, you know what I'm talking about.