Case studies are an effective way to develop a contextual deeper understanding of the material learned in BM.
BM units are studied through current and past events. And BM exam questions are based only on stimulus materials.
"This is the life story of Warren Buffett. Chairman and CEO of Berkshire Hathaway and one of the wealthiest people in the world. Buffett made his fortune through canny, rational investment and is probably the greatest, most successful investor of all time. This documentary traces his history, from childhood to the present day and interviews not only himself, but many of his close family and business associates" (Investor Archive YouTube Channel)