A lesson plan on the three branches of government, designed for grades 5-8, but with material adaptable for lower grades, is available on the EDSITEment-reviewed website The Truman Library. Particularly pertinent is a summary of the checks and balances in the system.
Well, thanks to a Nielsen report, we now know the answer. And it's 42. No, just kidding. According to Nielsen's survey, based on over 65,000 users, the average U.S. subscriber is using about 450 MB of data per month, with this number representing data usage for the first quarter of this year. It's not a small number, but not that high either.
Here is an example of our usage, for the 12 months between 27th May 2008 and 27th May 2009: 8,587 kWh Peak usage. 4,441 kWh Off Peak Usage. This is a total of 13,028 kWhs per year, (35.7 kWh per day) compared to the Australian national average Electricity consumption of 6,570 kWhs per year (18 kWh per day). (This double door unit is rated at 1240kWh per year, but uses about 1600kWh per year after 3 weeks testing). $ 2  195 Computer (in use 16 hours per day) / Printer / Broadband Modem / Telephone. $ 3  45 Home Computer with Printer for normal family use.