Song Li is a five-year-old girl．She lives with her parents in a big house．She usually plays with her mother when her father goes to work．Her father teaches history in a school．He always comes home with delicious food．And Song Li is happy to see her grandparents too，because they always come to see her with delicious food．

    Su Yong is a thirteen．year-old boy and in Class 3，Mr Long's class．He is good at computer science and he usually does his homework on the computer．He hopes there 'll be more robot teachers some day and they will help with checking homework．Su Yong's father is a manager and drives to work every day．Sometimes he drives Su Yong to school．But there is too much traffic on the way to school．Su Yong is afraid of being late．so he usually tides his blue bike to school．

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    Mona doesn't like to ask people for help. But it is hard for her to perform daily activities on her own. She is almost 13, yet she is no larger than a 5-year-old. Mona has trouble keeping her balance and can't walk very far. When she uses a wheelchair, she can't push it herself.

    Fortunately, Mona has a wonderful service dog named Sam. A service dog is a dog that has been trained to assist someone who has a physical problem. Sam lets Mona lean on him when she walks. He also pulls her wheelchair and turns lights on and off. When Mona drops something, Sam picks it up. He even pulls her socks off at night.

    Sam also helps Mona with everyday tasks at school. He carries her books from class to class in a special backpack. He puts Mona's completed assignments in her teachers' homework trays. In the lunchroom he throws away her trash.

    Besides making Mona less dependent on other people, Sam helps her lead a fuller life. Mona's classmates flock around Sam like geese. This has helped her make friends. Sam also helps Mona be more active. With his aid, she raised over $500 in walk-a-thon for her local humane society.

    Because of Sam, Mona doesn't have to ask people for help. Sam brings her closer to other kids. And he even helps her contribute to her community.

    We go to school every day to become better people. How can we start to make big changes in our lives? Perhaps we can get tips from former US First Lady Michelle Obama. During a visit to China from March 20 to 26 in 2015, Obama shared her views on education and youth empowerment with students.

    The first lady encouraged Chinese students to aim high and get a good education. At Chengdu No 7 High School, she told students that having humble roots doesn't matter as long as you have perseverance (毅力). Obama said her family was not rich. Like many Chinese students, her parents had big dreams for her. She felt the weight of her parents' sacrifices (牺牲) on her shoulders and worked hard to make them proud. Persevering was not easy, though. Sometimes she had to wake up at 4:30 am and study late into the night. "But whenever I got tired or discouraged… I would remember something my mother always told me. She said: A good education is something that no one can take away from you.'"

    Mrs Obama also encouraged Chinese students to study abroad to broaden their horizons (开阔视野) in a speech at Peking University. "As the Chinese saying goes: It is better to travel 10,000 miles than to read 10,000 books," she said. It's not enough to get good grades in school. It's also important to have real experience with languages, cultures and societies that are different from your own, she noted. Studying overseas can also benefit future international relations. It can help young people from different countries work together to deal with shared problems like climate change, Obama said.