What is the fine-grained topic of the following text: As the stunningly successful nonprofit organization, Teach For America (New York Times) celebrates its 20th anniversary, its founder Wendy Kopp issues a passionate and inspiring summation of what she and TFA corps members have learned: that educational inequitythe achievement gapis a solvable problem, and that the key to solving itin a single classroom, a school, or system-wideis leadership. Only return the topic.
The success and impact of Teach For America on educational inequity.