If you're encouraged by the tiny house movement and think 160 square feet is just enough for your needs, you may want to contact the Academy of Construction and Design (ACAD) at IDEA Public Charter School in northeast Washington.

    Students in the program built a micro house with a kitchen, a bathroom, a sleeping loft with space for a queen-size bed and a storage loft, all set on a trailer for mobility. The exterior of the house was part of a continuous living exhibit in 2015 and was moved to the IDEA campus so students could work with builders to complete the interior earlier this year.

    McMahon said the D. C. government's approval to push companies to hire District residents was at odds with the school system not preparing students for careers in construction, exploring or electrical work. McMahon gathered industry and community leaders to establish ACAD in 2005, and he said 100 percent of the companies he contacted responded positively to the idea, including major firms such as JBG, Clark Construction, Hines Construction and Boston Properties.

    “When students make the connection between what they are learning a potential career, their academics improve dramatically,” said Carol Randolph, chief operating officer of the D. C. Students Construction Trades Foundation. “Some of them who didn't think college was an option now have a better chance because their classes have become relevant to a job.”

    “We teach them life skills and explain that even if you start as a laborer, there are opportunities to move up quickly,” he said. “We rewrite the story for them and explain that they can work for a few years, make good money, get promoted, and start their own business or go to school with less debts.”

    “Parents and school advisor can be the biggest obstacles because of the negative idea of construction as a blue-collar career,” Karriem said. “I get middle-school advisor on board to talk about the opportunities this education provides. These kids are learning lifelong skills that can help them in other fields, provide them with income and allow them to take care of their homes.”

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    The arm bones of women who lived 7-000 years ago show a surprising level of strength-even higher than today's professional athletes. That's according to a first-ever study comparing prehistoric(史前的)bones to those of living people. The finding suggests a revision of history — the everyday lives of prehistoric women were filled with hard labor, rather than just sitting at home doing lighter tasks while the men struggled and fought for life.

    “Before the study, there are no clear records describing how our ancient ancestors lived. It can be easy to forget that bone is a living tissue, one that responds to the difficulties we put our bodies through,” said lead author Alison Macintosh. “Physical force and muscle activity both put pressure on the bone. The bone reacts by changing in shape, thickness and other aspects over time. ”

    Previous studies only compared female bones to contemporary male bones, the researchers said — and that's a problem, because the response of male bones to stress and change is much bigger than that of women. For instance, as humans moved from a hunter-gatherer lifestyle constantly on the move to a more settled agrarian (农耕的)one, changes can be observed in the structure of the shinbone (胫骨) — and these changes were much more evident in men.

    However, a comparison of the bones of prehistoric women to the bonos of living female athletes can help us work out a more accurate picture of what those prehistoric women were doing. “By analyzing the bones of living people and comparing them to the ancient hones, we can start to explain the kinds of labor our ancestors were performing,” Macintosh said. What they found was that women's leg strength hasn't changed a great deal, but their arms used to be very powerful. Prehistoric women, the researchers found, had arm strength 11〜16 percent stronger than those of modern rowers, and 30 percent stronger than those of non-athletes.

    Love to sink into your chairs and relax when you get to school. Then you will not be happy to hear that schools all over the world are seriously considering exchanging traditional desks for ones with no seats at all — Yes, that means you will be encouraged to stand through those already too long math and science lessons! Why would anyone even think of putting kids to such cruelty. Experts say it improves their health and helps fight obesity. While that may seem a little far-fetched (牵强的), the officials at the few schools around the world seem to agree.

    Among them are educators from the College Station Independent School District in Texas, who recently completed a week-long experiment involving 480 students across three elementary schools. The 374 kids that agreed to participate in the study were provided a device that helped record step count and calorie consumption over the entire period.

    All 25 teachers involved in the study reported that students appeared to be more alert and concentrate better, when allowed to stand. The one thing that did surprise the researchers was that younger kids were more willing to stay standing than kids in higher grades. They believe this may have something to do with the fact that after years of being asked to “sit still”, older kids have a harder time adjusting to this unexpected freedom.

    American schools are not the only ones reporting success with stand-up desks. Four schools in Perth, Australia, which have been testing them since October 2013, have seen similar results. In May 2014, Grove House Primary School in West Yorkshire, became Europe's first test one, with a seven-week trial that involved the use of desks made by Ergotron in their fifth-grade classrooms. While official results are not out yet, early reactions from both teachers and students, have been extremely encouraging.

    The findings of these studies and others done previously, all seem to mean that allowing kids to move around in classrooms is a win-win for students and teachers — it helps kids get healthier and provides educators with a more attentive audience.

    Safe Travel Abroad

    Preparing to go traveling abroad can be really stressful （有压力的）, especially if you don't know what to expect. Here is a list of important things to remember, so you know exactly what you need to do before you take off.

    What vaccines(疫苗) do I need?

    Go to your doctor for advice as soon as you know you're going traveling. They will know what vaccines you will need and will be able to advise you on when you need to have them. Remember, some vaccines need to be given months ahead, so make sure you book an appointment as early as possible.

    Do I need a visa(签证)?

    It's important that you have the correct official documents for traveling abroad. If you don't have the necessary paperwork, you might be refused entry. You'll need to check that your passport hasn't been out of date either.

    How do I arrange travel insurance(保险)?

    Travel insurance is really important. It can protect you in different kinds of situations, such as if you need medical treatment or if your flights are canceled. Travel insurance can be arranged easily online or over the phone, but you can always turn to your local travel agency. Travel agents will also be able to advise you on what you are insured against.

    For over 70 years, UNICEF has been putting children first, working to protect their rights and provide the assistance and services they need to survive and develop all over the world.

    It's the end-of-year giving season, and UNICEF has lots of good news to share about the influence its supporters have had on the lives of children. Thanks to its generous donors, UNICEF has helped save more lives than any other humanitarian organization.

    Monthly donors are a major reason why UNICEF can make that claim, according to Karla Coello, UNICEF USA Senior Director for Monthly Giving. “Last year, UNICEF responded to 377 humanitarian emergencies, from conflicts to natural disasters,” says Coello. “Emergency appeals bring in important revenue - but after the emergency, there are still a lot of things children need to make life bearable. That's what our monthly donors provide.”

    When drought destroys crops, conflict forces families from their homes, an epidemic breaks out or a disaster strikes, children suffer most. And in some countries, even the best of times are dangerous for its youngest citizens. Every day more than 15,000 children under 5 die from preventable causes.

    Protecting children before, during and after a crisis requires a reliable source of funding. The constant stream of revenue provided by monthly donations enables UNICEF to reach children with what they need most when they need it, prepositioning emergency supplies before a disaster strikes and continuing to build sustainable solutions after an immediate crisis has subsided.

    Monthly giving is also important to funding large-scale interventions(介入). Thanks to UNICEF's global immune campaigns, the world is now nearly free of polio(小儿麻痹症)and there are only 14 countries where mothers and children still face maternal and neonatal tetanus(破伤风)deadly threat. And UNICEF programs in 120 countries are helping to prevent and treat malnutrition, which is linked to nearly half of all deaths of children under 5.

    “UNICEF USA monthly donors are our most engaged, most dedicated supporters,” says Rebecca Volpe, UNICEF USA Manager, Monthly Giving. “So we do our best to make them feel appreciated by keeping them thoroughly updated about the powerful impact they are having and showing them how much they matter to us.” In turn, monthly donors tend to be dedicated supporters. “Protecting children - giving them opportunities to play, learn, feel safer, heal - is critical to us,” explained a survey respondent, expressing a commitment to children that UNICEF USA's Monthly Giving team sees every day.

    Supporters who sign up with UNICEF USA to give monthly automatically become members of the Guardian Circle, which affords them benefits, including:

    Annual statements to make tax time easier

    An easy-to-use donor access that simplifies modifying gift amounts, updating payment methods and making other changes, including the timing of donations with the option to cancel at any point

    Targeted communications in the form of monthly statements and a quarterly 8-page newsletter with stories from the field.

    A team available to answer questions via email or phone.

    “We have some donors who are on fixed income, others who can afford to make considerable monthly donations," says Coello. “Whether you give $5 or $700 a month, you are super important to us. What's important is that they all really want to give and help children. And that's amazing.”

    It can be time-consuming and difficult to track charitable donations. At end of year, Guardian Circle monthly supporters receive one statement that makes filing tax returns easier - and it's always delightful to see how much good has been done for the world's most vulnerable(受伤害的)children.

Living a healthy lifestyle lies in forming the right eating habits. Here are some of the good habits you can develop when it comes to healthy eating.

Drink plenty of water, you must drink at least 8 glasses of water a day. You may need even more water if you are in a hot environment or if you are exercising.

Eat breakfast. Breakfast is the most important meal of the day. A recent study has shown that those who eat breakfast will use an average of 100 calories less during the day than their colleagues who skip breakfast. They will also be able to concentrate better.

Don't skip lunch. If you do so, your blood sugar level will drop and your metabolism (新陈代谢) will slow down. When you get home you are starving and eat everything you can find.

We all need to snack from time to time, but please choose your snacks carefully. In fact, it's a good idea to eat two healthy snacks besides your three main meals. Choose healthy snacks like fruits, low fat yogurt, cottage cheese with apple sauce.

Eat your fruits and vegetables. We should eat at least 5 servings of fruits and vegetables a day. Take a piece of fruit for a snack, add some bananas and raisins to your favourite breakfast cereal (谷类食物), have a salad of lunch, and eat at least one vegetable at dinner each night.

Do not eat your dinner too late. Try to eat dinner at least 3 hours before you go to bed, this will give your body a chance to digest most of the food before you rest for the next 8 hours. Plan dinner for the week ahead of time and make sure you have everything you need in the house so other family members can get ahead start on dinner if you have a late meeting at the office.