Alumni can make a very big difference at both their K-12 schools and their colleges. 

• For K-12, learn about the I Have a Dream Foundation. 
    
• For college, check out P' 55. This organization is dedicated to building on the success of Princeton '55 by getting alumni organizations throughout the country to form their own nonprofit to help lead their alma mater from football envy to doing good.

For more information, see chapter 16 of How You Can Help to read about Eugene Lang who gave back to his elementary school and set up the I Have a Dream Foundation to help others do the same around the country.