Doctors use liquid nitrogen — a substance registering a wickedly cold 321 degrees below zero Fahrenheit — to freeze warts so they dry up and fall off. Yes, folks, this stuff kills tissue. So imagine what it might do to your stomach if you drink some.

A new report warns thousands of young people held in solitary confinement each year inside adult jails and prisons could suffer lasting consequences including hallucinations and mental illness.

The study by the American Civil Liberties Union and Human Rights Watch reached out to 125 juveniles in 19 states. Many of them reported being isolated for weeks at a time, in small cells with little natural light, no access to education, and minimal opportunities to exercise.

The United States Anti-Doping Agency has made public all the evidence it has against cyclist Lance Armstrong. This is the culmination of a battle that has raged for years: The USADA has said its evidence proves beyond doubt that the now-dethroned seven-time Tour de France winner doped, and Armstrong has always maintained his innocence.

One member of the Russian punk band Pussy Riot was set free by a Moscow court today. But two others who were given two-year prison sentences after being convicted of "hooliganism connected to 'religious hatred' " will remain in prison.

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MICHEL MARTIN, HOST:

Our next guest spent years allied with key conservatives on education reform. Diane Ravitch is the former assistant secretary of education under George H.W. Bush. During her time in that administration and afterwards, she advocated standardized testing and expanding school choice through charter schools. Those would later become key elements of No Child Left Behind under President George W. Bush, but she eventually became a critic of these approaches.

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MICHEL MARTIN, HOST:

Now we turn to the former Secretary of Education Margaret Spellings. She served under President George W. Bush. She's now the founder and leader of Margaret Spellings and Company. That's a consulting firm in the Washington D.C. area. Madam Secretary, welcome to you. Thank you so much for joining us.

MARGARET SPELLINGS: Glad to be here, Michel. I'm sorry I'm not seeing you face to face. Hurry back.

MARTIN: I know. We'll have to rectify that.

SPELLINGS: We will.

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MICHEL MARTIN, HOST:

I'm Michel Martin and this is TELL ME MORE from NPR News. We are continuing TELL ME MORE's first Twitter Education Forum. Join in on Twitter at hash tag NPREdChat. Coming up, we'll hear the voices of people you could argue have the most invested in America's schools, the students, but first, we turn to online education. If you or your child have ever been stumped by homework, then you probably already know about the Kahn Academy.