How to copy variables from one story file to another?

Is there a way to share variables between two separate storyline files? So if conditions are met to adjust variables in the first course, they can be referenced in the second course. I'd like to create some adaptive branching from one course to another. For example, an assessment that branches to a separate remedial course which shows information based on scores of the first. I know I can do this within a single storyline file, but was hoping to make a separate remedial course file. I hope this makes sense.