Understanding IB 

Discusses many aspects of the International Baccalaureate program...as well as offers alternatives to the IB program.

Excerpt (emphasis added):

Hard work. High expectations. International focus. These seem like positive aspects. So what causes parents, educators, and school leaders to question whether the IB should be integrated into the American education system? The answer can be summed up in Seven C's ­ Controversy, Calendar, Curriculum, Classism, Courts, College Credits, and Cost.

url to download pdf:   http://www.ceopa.org/documents/Mar-April2006_000.pdf

Also see the Commonwealth Education Organization webpage for other International Baccalaureate information
http://www.ceopa.org/InternationalBaccalaureate.html