In the Virtual Classroom, you have the option to save whiteboard content so that it's automatically loaded whenever you start a new class.
You need to follow a few simple steps:
1. Enter your Virtual Classroom
2. Click on the 'Past Classes' button
3. Find the class you'd like to use and press the 'pin' icon. This means that the whiteboard content from the class pinned will be automatically loaded in every class you create until you unpin it.