"Education is probably the most powerful weapon for change. ... So there's a large part of my initiative that's really trying to get into the heads of these young people and use my story as an example," Obama said in Tanzania.
The role is one the first lady has grown into since moving into the White House in 2009 -- a role she recently described as a "freeing and liberating opportunity" to work on issues of personal passion.
"Four to eight years is really a blink of an eye," Obama told the forum of African first ladies. "And you often find that you're just starting to get your teeth into your issues, and then it's time to go. ... But none of the work that we do and any of us does will be concluded at the end of a term."