what % of school is a waste of time?
I think 66% of the stuff they teach you at school is useless that you would never use in the real world. I was helping my brother with his science homework today,some of the questions were:
what can the average person do to reduce their own use of aluminium?
what effect does global warming have on the supply of aluminium?
global warming and aluminium?!? literally the only thing I could come up with is that when it gets hotter you drink more beer and use more cans. and i definitely think they teach more practical things in primary school than in high school.
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The average person could use more glass bottles instead of cans. Also, aluminuim exposure has been linked to alzheimer's disease so reducing aluminium consumption is a good thing.
Read this passage (complete article link is below):
Environmental aluminum is linked to increased rates of AD. Aluminum is a common constituent of the environment and has no recognized biologic function. It is absorbed primarily through the intestine but also through the lungs and skin. Seven studies have related elevated aluminum concentrations in drinking water to an increased incidence of AD.
Of more practical importance is a case-control study which looked at the association of AD and lifetime exposure to aluminum in antiperspirants and antacids. Scientists found a direct correlation. The more antiperspirant that was used, the more likely the person would develop AD. The same held true for aluminum antacids. The risk in high users was as high as 300%.
There is another line of independent evidence that shows aluminum is associated with the cause of AD. If persons affected with AD are given a compound which binds aluminum and helps to remove it from their body, they deteriorate at much slower rates compared to those who do not receive the binder.
http://www.mercola.com/1998/archive/aluminum_and_alzheimer_prevention.htm
As for the percentage of school that is a waste of time... I'd say 50% is filler. Kids who are tutored (actors, musicians, etc) are only required 4 hours/day and they learn everything needed to graduate. Reports, projects, learning activities not to mention recess, lunch, assemblies, study hall, PE, band, choir, art, detention, and (for us church school kids) bible class (gasp!) are all time killers so we stay in school 12 long years instead of 6 (not including preschool and Kindergarten which are the most important school years in my opinion). I'm not saying that the other stuff is not important, beneficial or valuable to know and experience.