Each year, nearly half a million teachers switch schools or leave the profession altogether. Eric Soule, who landed his first full-time job at a charter school in Riverside, California, in 2013, spent years as a substitute teacher in public schools.
"It really seemed like the school districts were stringing me along," Soule said. "[They said] 'Oh, at the end of the year we can hire you on.' And that happened year after year."
Ellen Moir, CEO of the New Teacher Center, says young teachers, in particular, frequently leave fast.
"Mostly they're getting placed in urban districts or rural America, in some of the toughest schools and some of the most under-served communities," Moir said. "And they are given a sink or swim method."
Many of them swim in the same direction.
"Typically the path is toward higher-wealth, whiter districts, where students can predicatably perform better," said Susan Moore Johnson a Research Professor at Harvard's Graduate School of Education.
Moore says her research shows that a school's culture plays a huge role. It also indicates that teachers will stay in schools where they have good leadership and feel supported.
Most of the mobile display ads that pop-up on our phones don’t mean a thing -- We ignore them and keep on tapping and swiping. But a study out of Columbia Business School sheds light on what consumers pay attention to in this booming mobile advertising industry.
Miklos Sarvary, the report's co-author, directs the Media Program at Columbia Business School. He says if advertisers want mobile users to think twice about their ads, they should offer up useful items.
“These would be products like cars, or refrigerators, or lawn mowers, so pretty high ticket items, generally,” says Sarvary.
He says important purchases get more attention than pop ups for pleasure items like movie tickets and jewelry.
“What happens is that when a little ad like that pops up, it kind of makes you think about the decision again,” he says. “So, it reminds you of the information you already store in your mind.”
Jim Davidson is Director of Research at Bronto Software, which connects retailers with customers on mobile devices.
“Mobile really encompasses a lot of different technologies in a lot of ways that folks shop, and it’s really up to marketers to find the best way to have that conversation,” Davidson says.
Sarvary’s report shows nearly $17 billion was spent on mobile advertising last year, a figure that is expected to quadruple by 2017.
The president says at least one U.S. citizen is among the nearly 300 people killed when the plane crashed in the eastern Donetsk region.
At least one Israeli soldier and more than two dozen Palestinians have died since tanks rolled in late Thursday. It's the first time in five years that Israel has sent ground troops into a conflict.
Gil Kerlikowske, head of Customs and Border Protection, tells NPR that he is reviewing scores of incidents. "We need to be better at admitting when we're wrong or where we've made a mistake," he says.