>Opportunity cost tends to be more subjective and harder to realize because the success of opportunity is hard to predict. Sure - in an effort to limit that I

>Opportunity cost tends to be more subjective and harder to realize because the success of opportunity is hard to predict. Sure - in an effort to limit that I chose $18 per hour as a wage, which is lower than the median individual wage in the US ($22). It's a pretty conservative estimate of lost income. If you didn't want to add that in I would say remove all salaries from the cost of education, generally, and then compare the cost per pupil. So you're comparing like to like - mostly just the cost of supplies, facilities and educational trips. Your pluses are great, I'm not taking away from that, but they are at least somewhat represented in the increase in overall score, no?