I know you can share a class with the commons, which then allows you to copy the class to multiple classes, but is there a way to just import modules from the sandbox and add them to multiple classes at the same time? 

For example, at my school we have 3 teachers who teach Global Studies. We use the sandbox as our common course. But I have to import content from the sandbox to each individual class. How can I add content to all of my classes straight from the sandbox?