As children begin to head back to school, there are several things that you can do to make sure that your child stays healthy and performs at their peak potential during the school year.

    1). Make sure your child is up to date on their immunizations(免疫). The summer is a good time to schedule visits to the doctor's as your child is not in school, and the visit won't require that your child miss school days.

    2).Encourage proper nutrition. America faces childhood obesity(肥胖). This means that the percentage of overweight children is increasing each year, and this will place your child at risk of developing a variety of diseases when they are middle age or even young adults. You can start helping your child to become healthier by offering fruits and vegetables at home instead of calorie heavy potato chips and candy.

    3). Get your child involved in sports activities. Activities in high school such as track and cross-country are important for socialization for your child, as well as helping to improve their health. You can get your child interested in wholesome activities by discussing with them how you enjoyed similar activities in high school.

    4). Have the birds and the bees conversation with your child. Many children become sexually active in junior school and senior high school, and the sooner you discuss sex with your child the sooner they will be prepared. Tell your child that there is always the possibility of infecting a sexual disease when two people have sex; and discuss with your child the use of condoms. The sooner you start having this embarrassing situation the better.

    5). Know your child's friends. You can do this by inviting your child to bring their friends over to your house for a pizza night, or by chatting with them when they stop by your house. If you find your child's friend has a bad reputation, then you could consider introducing your child to a different network of people, such as through the girl/boy scouts. Forbidding your child from seeing a certain person may only lead them to rebel and become closer to that person.

    6). Discuss with your child the seriousness of drug use and abuse. Your child may not realize that using drugs can have serious consequences. Your child may get the false impression that drug use is his right. Explain to a child that saying no to drugs is their right, and that anybody offering them drugs is not their friend.

    7). Help your child to avoid a life long smoking addiction by discussing with them the consequences of smoking. The sad fact is that most smokers became addicted when they were in their teenage years, and are unable to quit for long periods of time and often die many years earlier due to their smoking habit which increases the risk of lung cancer, heart disease, and a variety of medical conditions. Even if you are a smoker yourself, you can discuss with your child about how damaging smoking can be on a person's health.

    8). Impress upon your child the importance of traffic rules. Tell them that it is OK to wear a seat belt in anyone's car, because it may save their life one day. If your child rides a bicycle or a skateboard, then discuss with them the importance of always wearing a helmet. As you child becomes qualified for driver's permit, you should discuss with them the importance of prevention from drinking and driving.

    9). Be cautious about signs of depression in childhood. A surprisingly large number of children may become depressed, and a small number of teenagers and children commit suicide(自杀) each year. Realize that any signs of unusual depressed mood, angry outbursts, suicidal comments, feelings of hopelessness, and loss of enjoyment of activities with friends may be signs of depression.

    The Coolest Inventions

    An Oceans Vacuum(吸尘器)

    There's a collection of plastic trash in the middle of the Pacific Ocean. It's bigger than Texas and growing. The way to clean it up now is to catch it with nets. That is both costly and slow. Instead, the Ocean Cleanup Project proposes a 62-mile-long floating barrier that would use natural currents to trap trash. If next year's trials succeed, a full cleanup operation would aim to start in 2020. It could reduce the trash by 42% over 10 years.

    Easy-On Shoes

    In 2012, Matthew Walzer, a high school student with a disability, sent a note to Nike. “My dream is to go to college,” he wrote, “without having to worry about someone coming to tie my shoes every day.” Nike assigned a design team to the challenge. This year, they came out with their solution: the FlyEase. The basketball shoe can be fastened with one hand. A pair of Nike FlyEase shoes sells for $130.

    An Airport for Drones (无人机)

    As Amazon, Google, and others get ready for drone delivery service, there is one big question: What kinds of home bases will their drones have? Rwanda, in Africa, may have the answer. There, workers will soon start work on three “drone ports”. The goals is to make it easier to transport food, medical supplies, electronics, and other goods through the hilly countryside. Construction is set to be completed in 2020.

    Podcasts (播客)

    The B S. Report

    Designed for the sports fan with a sense of humor, the B.S. Report is hosted by the sportswriter Bill Simmons. Simmons show is in very loose and free form and it's not uncommon for him to go almost a whole show without even mentioning sports.

    Wait, Wait…… Don't Tell Me

    One of the most popular Programs on National Public Radio, Wait. Wait... Don't Tell Me is now available as a podcast. The show is a news program in the form of a game show. Each week a group of humorists and writers join host Peter Sagal in Chicago, where they are quizzed on the weeks most important and funny news stories. Listeners also get to call in to play different news-related games for a prize

    The Moth

    The Moth is a weekly podcast run by a nonprofit art organization. The show is made up of recordings of “true stories told before a live audience without notes”. Each week, the group releases short 10-20 minute tales told by people from all walks of life. Past Presenters have included writers, comedians, scientists, and even New York City police officers.

    Film spotting

    Film spotting is a weekly podcast and is a must-listen for any movie fan. The show is focused on movie reviews, but hosts Adam Kempenaar and Matty Robinson do more than just tell their listeners which new movie is worth seeing. They also discuss and examine the film as an art form. The how doesn't just focus on current movies, either, as the hosts frequently discuss old films as part of theme marathons.

    Gabriella's family immigrated to the US from Peru when she was two years old. As a compound bilingual (双语使用者), Gabriella develops two linguistic codes at the same time, with a set of concepts, learning both English and Spanish. Her teenage brother, on the other hand, might be a coordinate bilingual, working with two sets of concepts, learning English in school, Spanish at home. Finally, Gabriella's parents are likely to be subordinate bilinguals who learned a second language by translating it into their mother tongue.

    Regardless of accent and pronunciation, all types of bilingual people can become fully proficient in a language. It seems that the difference may not be apparent. But recently brain imaging technology has given a glimpse into how specific aspects of language learning affect the bilingual brain. It's well known that the brain's left hemisphere (半球) is in charge of logical processes, while the right hemisphere is more active in emotional and social ones. Language involves both types of functions. "Critical Period Theory" says children learn languages more easily because their developing brains let them use both hemispheres in language learning, while in most adults, language relies on one hemisphere, usually the left.

    Before the 1960s, bilingualism was considered a handicap that slowed the children's development by forcing them to spend too much energy distinguishing between languages. But a recent study did show that bilingualism may make you smarter. It does make your brain more complex, healthier, and more actively engaged, and even if you didn't have the good fortune of learning a second language like a child, it's never too late to do yourself a favor and make the linguistic leap from "Hello" to "Hola" "Bonjour" or "nihao" because when it comes to our brains, a little exercise can go a long way.

    Imagine a brand-new, magical pill which can measurably improve your memory, overall cognitive (认知的) performance, ability to learn new information, mood, ability to handle problems and more. Would you buy it?

    Yeah, yeah, you saw this coming: That pill exists, but not in pill form. You can have all of those benefits for free, and all it takes is going to bed a little bit earlier. So what are we to do to get a better night's sleep?

    First, learn how much sleep you need. Generally, if you're waking up tired, you're not getting enough. However, the gold standard of eight hours per night might not be right for you. A study from 2015 brought into question whether we need that magical number, so following your body is the best way to figure out the right rhythm. The only real guideline is to get as much sleep as you need to feel refreshed and energized the next day.

    Next, figure out your body's natural rhythm. Maybe after years of trying, you need to acknowledge that you're just not a morning person. And that's perfectly fine! Click the link and take the quiz to find out what kind of sleeper you are, and don't fight your body's natural sleep tendencies.

    Last, keep a consistent sleep schedule. This can be the most important part of your overall sleep quality We're all equipped with circadian clock (生物钟), which s that internal 24-hour timer that naturally tells us when to sleep, and the best way to getting rest and feeling rested is to keep this consistent. Fall asleep and wake up at the same time every day, and try to build as much regularity into your schedule as possible. And don't forget to keep your bedroom cool.

    If you think can-do, and you're creative and persistent, it's amazing what you can accomplish. During college, I remember being told that to fulfill my language requirement, I would "have to" take a class that I had no interest in and was meaningless to me. Instead of taking this class, however, I decided to create my own. So I put together a list of books I would read and the assignments I would do and found a teacher to sponsor me. I then went to the dean of the school and presented my case. He bought into my idea and I completed my language requirement by taking my self-built course.

    American aviator Elinor Smith once said, "It has long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things."

    It's so true. To reach your goals in life, you must seize the initiative. If you're feeling bad about not being asked out on dates, don't just sit around and sulk, do something about it. Find ways to meet people. Be friendly and try smiling a lot. Ask them out. They may not know how great you are.

    Don't wait for that perfect job to fall in your lap, go after it. Send out your resume, network, volunteer to work for free.

    If you're at a store and need assistance, don't wait for the salesperson to find you, you find them.

    Some people mistake can-do for being pushy, aggressive, or obnoxious. Wrong. Can-do is courageous, persistent, and smart. Others think can-do people stretch the rules and make their own laws. Not so. Can-do thinkers are creative, enterprising, and extremely resourceful.

    George Bernard Shaw, the English playwright, knew all about can-do. Listen to how he said it: "People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and if they can't find them, make them."