Earlier this month, students and parents in Washington, D.C. and Miami learned that massive amounts of student information gathered by schools had been compromised or stolen. In Miami, a man was arrested with students’ names, social security numbers…

What types of information are companies gathering about you? How can they use this information, or even trade it? And what rights do consumers have to learn how they're being tracked? Julia Angwin, senior reporter at ProPublica and the author…

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