I didn't have to document it's usefullness, there's no real job demand for chinese speaking Americans. Check your local newspapers and job market internet searches if you doubt that. I did document that it's extremely time consuming to learn Chinese, which means that the regular, more usefull courses must take a back seat to this 'multi-culturalism' idiocy.
The other reason why I documented that Chinese is very hard to learn is that I believe most of the public school students in Chicago will NOT learn it well enough to practice it even if it were necessary, (which it is absolutely not). Becoming proficient in Chinese is a difficult task, requiring time, effort, desire and language ability. Because of islamic terrorism the government could probably use some good translators proficient in Farsi, Arabic, etc. At least that would make some sense and has more ability to lead a person to a job.