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Research shows that teens need eight to nine hours of sleep at night, as compared with eight hours needed for adults. However, they are not getting enough sleep.

Tests by a professor at Oxford suggest that "students perform better in the afternoon, because their body clock is programmed about two hours later, possibly for hormonal reasons."

One solution is for parents to impose earlier bedtimes on their teenagers. A recent study found that "Teens whose parents pack them off to bed at 10 p.m. are less apt to become depressed or have suicidal thoughts than their peers who stay up much later."

With summer quickly fading into the distance and school starting again in North America parents are doing their best to gear up for another year. Sometimes it can seem positively overwhelming so before panic strikes, here are some things teachers would love for you to know to make the upcoming year a smashing success.

Joli OS is a free and easy way to turn any computer up to 10 years old into a cool new cloud device. Get on the Web and instantly connect to all your Web apps, files and services using the computer you already own. You may never need to buy a new computer again. It’s easy. Just download Joli OS. It installs in just 10 minutes.

Try turning the question around:  How do other people usually get where they need to go on time?  What steps do they take to avoid being late?  First, they check the clock every so often, particularly when they know there's a deadline approaching.  They estimate how much time they'll need to get wherever they're going and thus what time they'll need to leave where they are.  They pause to figure out how long it will take to finish what they're currently doing and get ready for whatever is coming next.  And then they adjust their behavior accordingly

I suspect that those who chronically show up late don't do these things.  Perhaps they have a tendency to lose themselves in whatever they're currently doing and don't discover what time it is until it's too late.

Ms. Wertheimer warms them up with a text-dependent question: "Are all of these native peoples nomadic?"

"On page 6, paragraph 2," he says, "the first sentence: 'The Haida and Tlingit of the Northwest built permanent wooden homes called longhouses.' "

seems to engage the kids

Introverted Kids Need to Learn to Speak Up at School

Over the past 3 years, scientists from around the world have teamed up to create dance videos based on their graduate research.

ZooBurst is a digital storytelling tool that lets anyone easily create his or her own 3D pop-up books.

Teachers increasingly value student-produced multimedia, student-created Web sites, blogs, and social media communities as well.

This is an important speech on a very important subject. But before I begin, I want to just speak briefly about Haiti, because during the last eight days, the people of Haiti and the people of the world have joined together to deal with a tragedy of staggering proportions. Our hemisphere has seen its share of hardship, but there are few precedents for the situation we’re facing in Port-au-Prince. Communication networks have played a critical role in our response. They were, of course, decimated and in many places totally destroyed. And in the hours after the quake, we worked with partners in the private sector; first, to set up the text “HAITI” campaign so that mobile phone users in the United States could donate to relief efforts via text messages. That initiative has been a showcase for the generosity of the American people, and thus far, it’s raised over $25 million for recovery efforts.

Information networks have also played a critical role on the ground. When I was with President Preval in Port-au-Prince on Saturday, one of his top priorities was to try to get communication up and going. The government couldn’t talk to each other, what was left of it, and NGOs, our civilian leadership, our military leadership were severely impacted. The technology community has set up interactive maps to help us identify needs and target resources. And on Monday, a seven-year-old girl and two women were pulled from the rubble of a collapsed supermarket by an American search-and-rescue team after they sent a text message calling for help. Now, these examples are manifestations of a much broader phenomenon.

The spread of information networks is forming a new nervous system for our planet. When something happens in Haiti or Hunan, the rest of us learn about it in real time – from real people. And we can respond in real time as well. Americans eager to help in the aftermath of a disaster and the girl trapped in the supermarket are connected in ways that were not even imagined a year ago, even a generation ago. That same principle applies to almost all of humanity today. As we sit here, any of you – or maybe more likely, any of our children – can take out the tools that many carry every day and transmit this discussion to billions across the world.

Some people describe Sophia as a mash up of Wikipedia, YouTube, and Facebook — focused solely on teaching and learning. It’s where you can teach what you know and learn what you don’t. Whether you’re a high school student, college student, teacher, professor, tutor or parent, Sophia makes knowledge easier to share, easier to find, and easier to organize. And it’s free.