At the time, Malala Yousafzai was just 11, but she spoke out through an anonymous diary on BBC Urdu's website, and later featured in two New York Times documentaries.
In recognition of her courage, she was recently short-listed for the International Children Peace Prize, awarded by the Dutch organisation KidsRights.
Now aged 13, she spoke to the BBC about her activism.
Video produced by BBC Urdu's Amber Shamsi.
First broadcast November 2011
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