In this task, you are given news articles and you need to generate a highlight, i.e., a short summary, with a maximum length of 10 lines.

(CNN) -- Over the past few weeks almost a third of all Americans headed back to classrooms -- from early learning centers to universities, as students and as teachers -- accompanied by the usual seasonal mix of joys and jitters. Or perhaps not. Lately it seems we've been inundated with bad news: The nation's report card is crummy; schools are broke and failing; graduates can't find jobs. And with competition for resources putting increased pressure on standardized test scores, cheating scandals have become practically ho-hum. Among all these headlines resides a more quietly sobering fact: This year's high school graduates will be the first educated entirely under the No Child Left Behind Act. In other words, a whole generation of kids who've grown up with an emphasis on multiple choice testing, who've been taught that knowing the one right answer is more important than the process of inquiry, who've learned that admitting "I don't know" is a crime. But the problem isn't simply with a narrowly conceived educational policy. Pressure to know the right answer (or, more precisely, to appear to know) isn't limited to the classroom. It's pervasive throughout our culture -- a reality at once daunting and hopeful. Daunting because it means real reform will require more widespread change. Hopeful because it means there's something every one of us can do about it. Maybe even starting today. I'm talking about breaking the habit of faking knowledge in order to save face. For most of us, the fear of not knowing -- of looking dumb -- gets ingrained when we're small and reinforced throughout life in ways both subtle and overt. For every time someone reassured us, "There's no such thing as a stupid question," weren't there ample experiences -- on the playground, at the dinner table, and yes, in the classroom -- that convinced us otherwise? Anyone who's ever been reprimanded or ridiculed for revealing ignorance knows all too well: The taste of shame is bitter and lingering. We'll go to great lengths to avoid it, often without deliberate thought. How many times have I found myself nodding in feigned recognition when someone makes reference to a person or book they assume I know? How many times have I been guilty of unwittingly inflicting similar discomfort on others? In some walks of life, presenting a knowing demeanor is practically a job requirement. One financial adviser recalls how, early in his career, he was so anxious to impress upon his clients that he knew was he was doing, he'd use meetings to "information dump" -- only subsequently learning that they'd been too embarrassed to speak up and confess they had no idea what he was talking about. A surgeon tells about the time when, as a new intern, afraid to admit unfamiliarity with a procedure and ask questions, she plunged in confidently -- and made an incision four times longer than the patient had been told the scar would be. Politicians routinely face shame if they confess to not knowing. Remember Rick Perry's memory lapse during the 2011 Republican primary debate? It seems we'll forgive our elected officials just about any breach of ethics, but let them admit to anything less than invulnerable certainty and they can kiss our vote goodbye. For the past several years, I've made a conscious effort to be candid about the limits of my own knowledge. As a college teacher, I've discussed this intention explicitly with students and colleagues. Guess what? I'm mortified to report: Despite my public resolution to practice this most essential form of academic integrity, I still catch myself engaging in a kind of knee-jerk, face-saving, passive dissimulation on a semi-regular basis. Based on what I hear from others, I'm not alone. Such behavior is apparently endemic. So what are we to do? For starters, talk about it. Own up to instances when we faked knowledge. Initiate conversations about what makes us more or less susceptible to this behavior. You're likely to hear some funny stories, and the experience of shared vulnerability is humanizing and makes for closer connections. Best of all, it creates an environment in which all stand to grow. My friend Lori, during her years as a high school history teacher, constantly encouraged her students to play in the wide-open spaces of uncertainty. One way she did this was by sharing her own gaps in knowledge. She'd model not just her comfort with not having figured everything out, but her delight in it. This, she seemed to convey, was where real intellectual pleasure lay: in the adventure of exploring the unknown. Often she'd assign Shakespeare as a way of getting students to think about power and status. She'd have them read one of the plays, then ask: "Who's more powerful in this scene?" Her students, anxious to deliver the "right" answer, would demand clarification. "What do you mean? Powerful how?" Lori would shrug and unfurl her fingers: Nothing up my sleeves. This isn't a trick. If her students protested, she'd say simply, "That's all I know." And so they'd be forced to grapple not only with the answer to her question, but with the meaning of her question, with the definition of power in the first place, which she, the authority figure, had just handed over to them: You guys figure it out. You decide. In this way, they were learning about history and drama but also about shifts in power, and who may wield it, and how classrooms can work and how societies can work, and about the very nature of "right" answers as opposed to the illimitable richness of interrogating the questions. This is what excites me when I think of heading back to school this fall: the prospect of bringing such generous, generative energy into the classroom. Perhaps filling in the ovals with number two pencils is important for helping us understand how far we are from achieving equity in schools across the nation. That is a vital project, deserving urgent attention. But we won't ever achieve equity -- let alone excellence -- if we don't also work to make our schools places where we all feel safe saying "I don't know." The opinions expressed in this commentary are solely those of Leah Hager Cohen.
This year's high school grads will have been entirely taught under No Child Left Behind .
Leah Cohen: There's too much emphasis on memorizing the right answer rather than encouraging inquiry .
She says people are deathly afraid of admitting that they don't know something .
Cohen: Our fear of ignorance keeps us from learning as much as we should .

(CNN) -- Thousands of Ontario, Canada, residents made do without power Monday in the aftermath of storms that toppled trees and brought down power lines. Meanwhile, residents in the upper Midwest prepared for bitter cold wind chills. More than 300,000 customers remained without electricity Monday across Ontario, including 200,000 in Toronto, officials reported, in the wake of what Mayor Rob Ford called one of the worst ice storms to hit the city. Still, the city was functioning and conditions were "not even close" to warranting an emergency declaration, he told reporters Monday. Toronto Hydro CEO Anthony Haines said major power lines are being restored at a rate of one every few minutes, but street-to-street work remains, and he couldn't offer a guarantee everyone will have power by Christmas. "My caution continues to be my caution. Let's really plan for the worst," Haines said Monday evening. "I am encouraged in the progress we have made today, obviously, with well over 100,000 customers being restored today." Ford said 100 trucks from other cities were on their way to Toronto to help restore power to more people. Toronto had opened more than a dozen warming centers some were expecting up to 300 people, officials said. In the United States, areas that had been as warm as the 70s on Sunday began a slide into frigid territory as Canada sent some of that cold air sliding across the eastern United States. Dangerously cold wind chills were on tap in parts of Kansas, Nebraska, South Dakota, North Dakota, Minnesota, Iowa, Missouri and Illinois. Wind chill warnings were posted for parts of Minnesota, warning of of wind chills as low as 45 below zero. Still, the picture was much calmer than over the weekend, when storms left at least 10 people dead. At least five people died in Kentucky floodwaters, two people died in Mississippi storms, and one person died in a traffic accident during Missouri's severe weather, officials said. A weather-related wreck Saturday near Wichita, Kansas, left one person dead, according to CNN affiliate KWCH-TV. And a tornado Saturday also killed a woman in Arkansas, CNN affiliate KARK-TV in Little Rock reported. The tornado was one of two rated at EF2 to hit the state on Saturday. Northeast: Hot and cold . New York City set a record high Sunday at 71 degrees, National Weather Service meteorologist Ashley Sears said. The previous record, set in 1949 and matched in 1998, was 63. But temperatures will fall each day until Wednesday, and by Christmas, New York might not even reach the freezing mark. And in northern New England, another round of snow and ice is set for Monday, the National Weather Service said. Southeast: When it rains, it pours . Rain was finally tapering off in Georgia, South Carolina and states in the Mid-Atlantic. A wave of cold temperatures will take its place Tuesday. Temperatures will likely be 10 to 15 degrees colder than normal on Christmas Eve and Christmas Day. Midwest: Ice and dangerous wind chills . The storms left some Michigan residents dealing with no electricity. Sara Hadley's family lost power after an ice storm struck her hometown of Lansing. She sent photos of some of the countless icicles in her neighborhood. "Last time we had ice like this was 1998," Hadley told CNN's iReport. Pacific Northwest: Another storm brewing . Coastal and valley rain as well as mountain snow is in the forecast through Tuesday, the service said. Higher elevations could get dumped with 6 to 12 inches of snow. CNN's Sean Morris, Adam Shivers, Todd Borek, Jareen Imam, Leslie Holland and Janet DiGiacomo contributed to this report.
NEW: Power restored to 100,000 customers in Toronto, electric company official says .
Blowing snow and dangerous wind chill temperatures will hit the Upper Midwest .
New York City will get steadily colder after reaching a record-breaking 71 degrees on Sunday .

(CNN) -- The U.N. Security Council has condemned the killing of a French journalist who was reporting from the violence-racked Central African Republic. French troops found the body of Camille Lepage during the search of a vigilante group's vehicle in a western region of the country, French authorities said Tuesday. "All necessary means will be employed to shed light on the circumstances of this assassination and to find our compatriot's murderers," the office of French President Francois Hollande said. The U.N. Security Council said that "those responsible for the killing shall be held accountable." Widespread unrest . Sectarian violence has killed thousands of people and displaced many more in the Central African Republic since a coalition of mostly Muslim rebels deposed President Francois Bozize in March 2013. The rebels have since been forced from power, but Christian and Muslim militias have continued to clash despite the presence of French and African peacekeepers in the country. Vigilante groups known as the anti-balaka, which translates to anti-machete, were formed to counter attacks on Christian communities by Seleka groups. But the anti-balaka have carried out deadly reprisals on Muslim communities. Humanitarian groups have warned that the country risks descending into genocide. Lepage's body was found in an anti-balaka vehicle in the region of the western town of Bouar. French Foreign Minister Laurent Fabius described Lepage as a "journalist and photographer of great courage." U.S. sanctions . News of her killing came on the same day that the White House announced that President Barack Obama had issued an executive order declaring an emergency in the Central African Republic and authorizing the use of sanctions to deal with the crisis. The order also imposed sanctions on five individuals involved in the unrest. The U.N. Security Council had in January unanimously voted to set up a sanctions regime against the people responsible for instability and atrocities in the country, putting three people on a sanctions committee list. More than 2.5 million of the country's roughly 5 million inhabitants are in need of humanitarian assistance and approximately one million people have been displaced, according to the White House. "Growing attacks perpetrated by both Muslim and Christian militias have brought CAR to a crisis of disastrous proportions," it said in a statement. Mother shot on the road to safety, victim of CAR violence . Will the people of CAR ever get to return home? CNN's Anna Maja Rappard and Laura Bernadini contributed to this report.

French troops found Camille Lepage's body in a vigilante group's vehicle .
France vows to use "all necessary means" to find her killers .
Sectarian violence has killed thousands of people in CAR since last year .
The U.S. announces sanctions against some of those involved in the crisis .