The most important thing to know about e-learning backgrounds is this: backgrounds aren't necessary. There's nothing wrong with a white or solid color for your course background. A lot of it depends on the goal of your course and how much content you're working with.
Here are a few early comps based on the initial mind map results:
Again, this is where the mind map is so valuable. The more you can lay out content-specific elements, the more options you'll have for designing the right look and feel.
Keeping things simple, here's the final background designs for the course. The license plate graphic makes a great content holder while leaving some valuable white space at the bottom of the slide for icons, navigation or extra information.
In the next lesson, we'll look at some design ideas for using characters in our courses.