Where can I find non profit cases to practice? BCG gives a lot of them in interviews. Also, how should one approach such cases?
You should check out Bridgespan website. McKinsey site also has a case example on social sector.
Related BootCamp article(s)
What does the complete application process look like for an undergrad applying to Bain's London office from Cambridge?
Is life as an analyst/associate consultant etc, if you cut through the marketing noise about client exposure, really just being a data slave in excel?
What is expected of undergraduate (and ug non business) candidates in terms of knowledge concerning economics, business concepts, finance concepts/technical knowledge etc?
Why aren't MBB (and other firms) upfront about the amount and type of of preparation required to be successful at interview?