While Jennifer was at home taking an online exam for her business law class, a monitor（监控器）a few hundred miles away was watching her every move.

    Using a web camera equipped in Jennifer's Los Angeles apartment, the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened for the secret sounds of a possible helper in the room. Her Internet access was locked — remotely — to prevent Internet searches, and her typing style was analyzed to make sure she was who she said she was: Did she enter her student number at the same speed as she had in the past? Or was she slowing down?

    In the battle against cheating, this is the cutting edge and a key to encouraging honesty in the booming field of online education. The technology gives trust to the entire system, to the institution and to online education in general. Only with solid measures against cheating, experts say, can Internet universities show that their exams and diplomas are valid — that students haven't just searched the Internet to get the right answers.

    Although online classes have existed for more than a decade, the concern over cheating has become sharper in the last year with the growth of “open online courses”. Private colleges, public universities and corporations are jumping into the online education field, spending millions of dollars to attract potential students, while also taking steps to help guarantee honesty at a distance.

    Aside from the web cameras, a number of other high-tech methods are becoming increasingly popular. Among them are programs that check students' identities using personal information, such as the telephone number they once used.

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    The term “formal learning” refers to all learning which takes place in the classroom regardless of whether such learning is informed by conservative or progressive ideologies(思想意识). “Informal learning”, on the other hand, is used to refer to learning which takes place outside the classroom.

    These definitions(定义) provide the basic difference between the two models of learning. Formal learning is separated from daily life and may actually promote ways of learning and thinking which often run counter to those obtained form practical daily life. A characteristic feature of formal learning is the centrality of activities which can prepare for the changes of adult life outside the classroom, but it cannot, by its nature, consist of these challenges.

    In doing this, language plays an important role as a major channel for information exchange.  The language of the classroom is more similar to the language used by middle-class families than that used by working-class families. Middle class children thus find it easier to gain the language of the classroom than their working-class classmates.

Informal learning, in contrast, occurs in the setting to which it relates, making learning immediately relevant (相关的). In this context, language does not occupy such an important role: the child's experience of learning is more direct, involving sight, touch, taste, and smell senses that are not used in the classroom. Whereas formal learning is transmitted by teachers selected to perform this role, informal learning is gained as a natural part of child's socialization. Adults or older children who are proficient (熟练的) in skill or activity provide—sometimes unintentionally (无意义地)—target models of behavior in the course of everyday activity.

    Informal learning, therefore, can take place at any time and place. The motivation of learner provides another important difference between the two models of learning. The formal learner is generally motivated by some kind of external goal such as parental approval, social status, and possible financial reward. The informal learner, however, tends to be motivated by successful completion of the task itself and the partial knowledge of adult status.

    Given that learning systems develop as a response to the social and economic contexts in which they are firmly, it is understandable that modern, high urbanized (城市化) societies have concentrated almost specially on the establishment of formal education systems. What these societies have failed to recognize are the ways in which formal learning inhibits the child's multi-sensory acquisition of practical skills. The failure to provide a child with a direct education may in part account for many of the social problems which trouble our societies.

    Pappadavada, a popular restaurant in Kochi, India, is urging customers and the community to put their leftover food in a fridge located outside of the restaurant for the hungry to take.

    People who are in need of a meal are encouraged to take from the fridge at any time, for any reason. Minu Pauline, who runs Pappadavada, has nicknamed the fridge, which was placed there on March 23 and is shaded by a neighboring tree, "tree of goodness".

    The fridge is open 24 hours a day, seven days a week and stays unlocked. Pauline asks that people write the date they left the food, so those who take know how long it's been there. But most food doesn't stay in the fridge for long. In spite of a huge response from the community and plenty of donations, the fridge needs to be brought more in to replace in time. Pauling herself adds around 75% to 80% of food from Pappadavada a day in the fridge.

    The idea to put a fridge on the street came to Pauline late on night when she saw a lady searching in a dustbin for food. She was especially saddened because that particular night, her restaurant had made a ton of food that they could have easily given the woman, instead of her searching for it. She felt like she contributed to waste, and avoiding waste is what Pauline pays her attention to.

    "The only thing I want to say no is that people are actually buying food and putting it in the fridge. But I'd rather people put their food they bought but aren't going to eat in the fridge instead of the dustbin," she said.

    How could we possibly think that keeping animals in cages in unnatural environments -mostly for entertainment purposes - is fair and respectful? Zoo officials say they are concerned about animals. However, most zoos remain “collections” of interesting “things” rather than protective habitats.

    Zoos teach people that it is acceptable to keep animals bored, lonely, and far from their natural homes. Zoos claim to educate people and save endangered species, but visitors leave zoos without having learned anything meaningful about the animals' natural behavior, intelligence, or beauty. Zoos keep animals in small spaces or cages, and most signs only mention the species' name, diet, and natural range.

    The animals' normal behavior is seldom noticed because zoos don't usually take care of the animals' natural needs. The animals are kept together in small spaces, with no privacy and little opportunity for mental and physical exercise. This results in unusually and self-destructive behavior called zoochosis. A worldwide study of zoos found that zoochosis is common among animals kept in small spaces or cages. Another study showed that elephants spend 22 percent of their time making repeated head movements or biting cage bars, and bears spend 30 percent of their time walking back and forth, a sign of unhappiness and pain.

    Furthermore, most animals in zoos are not endangered. Captive breeding(圈养繁殖) of endangered big cats, Asian elephants, and other species has not resulted in their being sent back to the wild. Zoos talk a lot about their captive breeding programs because they do not want people to worry about a species dying out. In fact, baby animals also attract a lot of paying customers. Haven't we seen enough competitions to name baby animals?

    Actually, we will save endangered species only if we save their habitats and put an end to the reasons people kill them. Instead of supporting zoos, we should support groups that work to protect animals' natural habitats.

    Google's new camera, called Clips, is a small, smart device. It comes with a case that has a clip (夹子), but it's not designed to be worn on your clothing. Most interestingly, it uses artificial intelligence to take photography out of your hands so it can capture moments on its own.

    This roughly 2-inch by 2-inch camera, with a three-hour battery life and Gorilla Glass for toughness, is intended for candid moments, like when a child does something cute that may happen too quickly for you to pull out your smartphone.

    Onboard the Clips device, it uses machine learning algorithms (计算程序) to help capture scenes. Those algorithms include face recognition. "Once it learns that there's a face you see frequently, it'll try to get nice photos of those faces," said Juston Payne, the device's product manager. And they also want it to recognize facial expressions, which involved "training it to know what happiness looks like". The Google team also trained it to recognize what not to shoot—like when a child's hand is over the lens, or if it is tossed in a dark purse.

    The only way to see the images is by connecting the camera with your phone, as it has no screen for viewing or editing.

    Were people concerned it could seem strange? Yes, Payne admitted. But they said they addressed that by making it obvious what it is. A green light on the front signals that it is on. Besides, unlike a camera meant to monitor your home, it is not connected to the Internet.

    "This product is only possible because of the way that silicon has advanced" Payne said, noting that it was only in the past year or so that they could squeeze the technology down into a device this size. Going forward, we're likely to get more assistance from the artificial intelligence packed into our apps and gadgets.

In summer holiday, the kids are out of school, so it is a good time to plan for a family travel. However, it's not easy to prepare for a family travel. Here are four travel apps(应用程序) to make your trip more relaxing.

Yuggler

Search nearby for family-friendly activities, from free events to worthwhile attractions. Use Yuggler to plan for what to do each day, based on the weather or the type of entertainment your kids want or need, and look through reviews written by parents who've been there. So instead of paying $20 per person for entrance to the big museum, you can locate just-as-fun spots with zero admission, saving a family of $80.

Sit or Squat

Held by Charmin, this app uses your phone's built-in location finder to find out the closest public restrooms. Perhaps more importantly, Sit or Squat provides the restrooms'cleanliness scores, which are made by the users who have been there. It is quite convenient.

My Disney Experience

The official Walt Disney World app's interactive map(互动地图), which uses your tool's GPS, helps you find restaurants, restrooms, and attractions nearby. You can also access real-time wait times for popular rides and character appearances, meaning you're making the most of your time.

Wi-Fi Finder

Find free Internet near your current location in a minute. Wi-Fi Finder works offline too. Before you head out, download the offline database(数据库) to your phone, so you won't waste data while searching for a hotspot, which is key during an international trip. You'll save as much as $15 off the hotel Wi-Fi cost.