My high school life has been filled with many ups and downs, whether it was social or academic. Even though my current high school was not my first choice, I never regretted attending Southside High School. “Since you have chosen it, then it is the best for you,” said my parents.

    Up until the junior year I did not realize my capabilities (能力) as a student. Being in the IB Program, I was told that my junior year would be the toughest in all the years of high school. With this “little” piece of information, I walked into my junior year, scared of my grades. As weeks went by, I started to believe that the junior year was not as hard as everyone had said, but I was wrong. My grades were rapidly declining(下降) and by the end of the first term I had five Cs in seven of my classes! I could not believe it — I did not want to believe it. I tried my best to get my grades up myself without any help from anyone, but my pride just made my grades worse. And I had to miss out on one of the most important speech and debate competitions all year: States. I was heartbroken. I realized that I could not survive my junior year on my own, so I had to get help fast.

    Once I got a tutor, my grades went from Cs, Ds, and even some Fs, to nothing but As and Bs. I slowly started to gain my confidence back in all of my classes and even myself. By the time the third and fourth quarter came around, I had been on the honor roll twice, and I was receiving awards from speeches and debates, tennis and school.

    Southside has taught me to always keep my head up and never give up on myself no matter what life throws at me. I am proud to be a Southside Tiger.

    All too often, a choice that seems sustainable(可持续的)turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol(乙醇) for fuel from corn. Corn is a renewable resource —you can harvest it and grow more, almost limitlessly. So replacing gas with corn ethanol seems like a great idea. 

    One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but that's not the end of the problem. Using corn to make ethanol means less corn is left to feed animals and people, which drives up the cost of food. That result leads to turning the fallow land –including, in some cases, rain forest in places such as Brazil—into farmland, which in turn gives off lots of carbon dioxide (CO) into the air. Finally, over many years, the energy benefit from burning ethanol would make up for the forest loss. But by then, climate change would have progressed so far that it might not help.

    You cannot really declare any practice “sustainable” until you have done a complete life-cycle analysis of its environmental(环境的) costs. Even then, technology and public keep developing, and that development can lead to unforeseen and undesired results. The admirable goal of living sustainably requires plenty of thought on an ongoing basis.

    Chris Thomas used to think of Facebook as just a platform to get in touch with his friends. He now believes the social networking service with saving his life. The 28－year－old was diagnosed with muscular dystrophy(肌肉萎缩症) nine years ago and has relied on a wheelchair ever since.

    On July 15，2015，Thomas was getting ready for bed in his apartment，when a shelving(架子) fell onto his wheelchair and knocked him over，causing him to fall and hit the back of his head. After waking up from a few minutes of coma(昏迷)，he realized he couldn't reach the string used to get the doorkeeper's attention.

    His phone was nearby and had the Facebook application conveniently open，so he posted a status update that immediately got his friends worried—even some he hadn't spoken to in years. “It was amazing，friends from six different states who didn't know each other were connecting with each other to get me help，” Thomas said. “Now that's the power of social media! You have hundreds of people at your fingertips.”

    Eight minutes after the status went up，an old friend，Leah，got in contact with Thomas' friend Brad，whose wife was in the neighborhood，and before you knew it there were 12 Facebook friends in his apartment，who took him to the hospital at once. They showed up to the rescue at the perfect time. Minutes before they arrived，Thomas thought he was going to have a panic attack，which he often suffers from because of his illness，but he's doing better now.

    “It felt good to know that my friends，even those I haven't spoken to in the past，came to save me，” Thomas said. “They all came together .I would've never imagined it.”

    Microsoft has developed a new smart phone app that interprets eye signals and translates them into letters, allowing people with motor neurone disease to communicate with others from a phone.

    The GazeSpeak app combines a smartphone's camera with artificial intelligence to recognize eye movements in real time and convert(改变) them into letters, words and sentences.

    For people suffering from ALS（渐冻症）, also known as motor neurone disease, eye movement can be the only way they are able to communicate.

    “Current eye-tracking input systems for people with ALS or other motor impairments are expensive, not robust under sunlight, and require frequent re-calibration and substantial, relatively immobile setups,” said Xiaoyi Zhang, a researcher at Microsoft who developed the technology.

    “To mitigate the drawbacks…we created GazeSpeak, an eye-gesture communication system that runs on a smartphone, and is designed to be low-cost, robust, portable and easy to learn.”

    The app is used by the listener by pointing their smartphone at the speaker. A chart that can be stuck to the back of the smartphone is then used by the speaker to determine which eye movements to make in order to communicate.

    The sticker shows four grids(方格) of letters, which each correspond to a different eye movement. By looking up, down, left or right, the speaker selects which grids the letters they want belong to. The artificial intelligence algorithm（程序） is then able to predict the word or sentence they are trying to say.

    The introduction of the iPad, with its touch screen technology, has allowed even very young children to take advantage of a computer. So what if all children in a school were given an iPad to use in class and take home with them?

    Anne Laure Bazin works in a school where every child, teacher and teaching assistant is given a free iPad to use in and out of lessons. For her, the main advantage of everyone having an iPad had been the improvement in communication. Documents can be emailed straight over to workmates during a meeting. Children submit their homework by email, or through the school's learning environment. Teachers now take the register (点名) using their iPad, which means that there is a record of which children are in school, and which classroom they are in.

    The use of iPad has encouraged greater sharing of resources among teacher. All communication with parents is now done by email. Working as a group in class is much easier as children can share documents. The whole class can look at one child's work by attaching (连接) the iPad to the whiteboard. If a child has forgotten the textbook, the teacher can take a photograph of the relevant (相关的) page and send it to the student in class.

    While the use of the iPad in schools has revolutionized (变革) the way children are taught, it hasn't completely replaced more traditional methods of teaching. Worksheets are still used in class as some children prefer the contact with paper. The children all have a textbook and exercise books. In Anne Laure's school, parents feared that the iPads would replace exercise books and children would lose handwriting skills. Anne Laure says, "The teacher are not ready to let go of the traditional style of teaching. We have welcomed the iPads in so much as they help communication and widen the resources available but we are not ready to let go of paper yet. The children themselves still value their exercise books and depend on them for review."

    People in Japan tend to live longer and stay healthier in their later years, with an increasing number of old people living alone. Japan is on a fast track to "ultra-age" with people aged 65 or above accounting for 28 percent of its total population in 2019；it was 26.7 percent in 2017. On the other hand, the number of births in 2019 fell to its lowest (about 941,000) since records began in 1899.

    Demand for care services for elderly people has increased. A shrinking (缩小) working population means fewer able-bodied adults are available to look after the elderly. State-provided facilities for the elderly are not enough which causes elderly people to turn to private ones but they are expensive.

    The country will be short of 380,000 of health nurses by 2025. The government has to turn to advanced robots to meet the shortage. A study found that using robots encouraged one third of the people to become more active and independent. Yet there is no robot that can provide the emotional support to the elderly.

    Japan provides a case study for China, which is also faced with a fast aging population. 17.23 million babies were born in China in 2019, about 630,000 fewer than in 2018. People aged 60 accounted for 17.3 of China's population in 2019. With a shortage of elderly care facilities and unbalanced supply, China may find it hard to deal with the rapidly increasing number of senior citizens.

    To meet the challenge, the Chinese government should make policy changes, which Japan is unwilling or unable to do or even consider. China should pay attention to the signals its aging population is sending and take proper and timely action.