Articles
RBA, The Business Cycle (a simple summary from the Reserve Bank), and the activity Business Cycle Case Studies.
Khan Academy, Lesson Summary: business cycles.
Videos
Jacob Cliffords, Business Cycles (5:22).
Economics Explained, What is the business cycle? (8:52).
Khan Academy, The business cycle (11:16).
Running Economy, Economic Activity, Living Standards & The Business Cycle (8:48).
Interactives
Khan Academy, Business cycles quiz.