After Effects Expressions
A course that starts with the basics of expressions in After Effects, and ends with creating your own expressions.
Learn how to create relationships between layer properties and use the keyframes of one property to dynamically animate other layers. For example, you can use the pick whip to link path properties, so a mask can take its path from a brush stroke or a shape layer object.
We’re not currently pursuing motion graphics courses, but this is a great suggestion. Our course 30 Days to Learn Adobe After Effects (http://cgi.tutsplus.com/courses/30-days-to-learn-adobe-after-effects) does cover expressions, but a course that goes much deeper is a good suggestion.