Teach for America.
I did some quick math and learned that if the government simply divided the money equally by the number of public school students, it would mean schools would have roughly $1,400 per student. Granted, this isn't a huge amount, but if we knew there would be at least this much yearly, imagine what schools could do to improve education.
Just spitballing, my first thought was to put an iPad, loaded with powerful applications, in the hands of every student. These would last a long time, so in subsequent years, the $1,400 per student could go for other useful education materials.
Keep in mind, this is in addition to the millions districts get each year from tax dollars and existing government funds.
The way this gigantic pile of cash is currently dispersed, though, most of the nearly 50 million K-12 public school students are left penniless.
So, how would you spend 71 billions dollars?