Andreas Schleicher created PISA, an exam that compares the knowledge of 15-year-olds from around the world. He says the test can help us understand why some countries perform better than others.
Sal Khan turned tutoring lessons with his cousins into a series of free educational videos called Khan Academy. His goal: to make learning accessible for everyone, everywhere.
Rachel Martin talks to Republican Rep. Lee Zeldin of New York, a member of the House Foreign Intelligence Committee, about the threats involving North Korea's missile tests.
President Trump says his promise to meet Pyongyang's threats with "fire and fury" might have been too soft. And, he says he's ready to declare the nation's opioid crisis "a national emergency."
President Trump amped up his words against North Korea, saying North Korea's leader "is not going to threaten the United States." The U.S. territory of Guam is in the shadow of North Korea's threats.
New French President Emmanuel Macron has seen a sharp drop in popularity. Pollsters attribute the drop in approval to budget cuts and attempts to overhaul the untouchable French labor code.
Ailsa Chang talks to Sharon Weston Broome, mayor of Baton Rouge, La., about the severe storms that flooded the city this time last year, and displaced tens of thousands of people.
The election commission has acknowledged that there was an attempt to hack the voting system on poll day but says that it failed. The opposition claims otherwise.
After the Russian president moved to expel 755 staffers from U.S. embassies and consulates in response to sanctions, Trump said his administration needs to cut the State Department payroll anyway.