Fox,
Your first chart is grants for disadvantaged children. The chart has nothing to do with the statement underneath it and doesn't show that at all. The chart goes from about 2 billion to about 14 billion. Read the statement and compare it to the chart. It appears your site has 2 charts mixed up with the sources listed wrong beneath them
http://www.ed.gov/about/overview/fed/10facts/edlite-chart.html#2
Reading the statement of dollars spent per year for education and finding the right chart, lets deal with it. The problem is the numbers aren't adjusted for inflation Fox. Current Dollars are current for the year. Constant dollars are adjusted for the year 2000 using inflation adjustment.
Adjusted they are for total spending - (Using deflater from table 1.3
http://www.whitehouse.gov/omb/budget/fy2007/pdf/hist.pdf)
1980 - $212 billion
1990 - $315 billion
2000 - $442 billion
2003 - $468 billion
Of course those are total numbers and don't reflect per student spending.
The NCES numbers can be found here...
http://nces.ed.gov/programs/digest/d03/lt2.asp#c2_9
They list constant where they have both constant and current. (Like in per pupil spending.) If they don't list constant, we need to assume current. And current dollars on NCES site match up with the figures in Historical budget tables current figures.
Interesting numbers in this table. They show that the % of Federal funds that schools have is actually down from what it was in the 60s and 70s befoe the Dept of education
http://nces.ed.gov/programs/digest/d03/tables/dt156.asp
In 1965 7.9% of K-12 funds came from Feds. In 1970 it was 8.4%. In 1975 - 8.9% 1980 - 9.2% 1981 - 7.4% Then in 1985 it is only 6.7%. It barely gets above 7% after that.
Since the inception of the Dept of Education, it appears that the amount of funding from the Feds for local k-12 schools has dropped as a % of overall funding.
The numbers show your argument to be false okie. The Feds don't contribute more of the funding to local schools now than they did before 1979.