Nine years ago, after Leo had died, people said to me. "I never knew he was your stepfather." You see, I never called him that. At first, he was no one special in my life. Then he became my friend. In time, I felt he was also my father.

    Leo married my mother when I was eleven. Two years later we moved into a house in a new suburban development, where we put down roots. At first our lawn was just a mud with wild grass, but Leo saw bright possibilities. "We'll plant trees there to give us shade as well as some flowers," he said. And just these little touches made our house different from all the others. More important, a real family was forming. Leo was becoming a full-time parent, and I was learning what it meant to have a father.

    Weekday mornings when the weather was bad, Leo often drove me to school. Having a father drop you off may have been something my classmates took for granted, but I always thought it was wonderful. Saturday mornings, we went to the hardware (计算机硬件) shop, then stepped into the five-and-ten, buying a sports magazine or something else. Some people might think that doing shopping together is nothing special, but I, who had ever before spent my childhood watching other families do their everyday activities, experienced them now with extreme delight. Looking back, I realized that Leo gave me what I needed most—the experience of doing ordinary things together as a family.

    Soon after we moved to the suburbs, one of our new neighbors introduced herself to me. She had already met my mother and Leo. "You know," she said, "you look just like your father." I knew she was just making a conversation--but even so... "Thank you", I said. Why tell her anything different?

    Do you want to make a difference in your community? The Verizon App Challenge can get you started. The first step is to think of a problem in your community. The next step is to create an app that can solve the problem.

    Group of five to seven students in middle school or high school, led by a teacher, can enter the contest. First, teams will compete on a local level. Teams that make it to the next round receive $ 5,000 for their schools. Finalists present their app ideas to judges in a live web conference. Next, the judges pick national winners. The top eight teams receive an additional $ 15,000 for their schools, and each team member receives a Samsung tablet. Plus, the winning teams get the chance to bring their app to life.

    A group of six girls from Los Frenos, Texas won the second annual Verizon App Challenge. They came up with the Hello Navi app concept, short for “hello navigation”. The app was designed to help visually impaired (受损的) students navigate (导航) their school. Do you have an app idea that could help solve a local issue? The deadline to register (登记) is November 24. Find more information and register your team at verizonfoundation.org/appchallenge.

Here are some tips from the Verizon Foundation to get you started:

    Get your team together for a brainstorming meeting. Write out all the ideas that conic to mind. Don't ignore challenges. Accept the idea that you can solve a problem that exists in your community. Ask family, friends and people in your community to share their thoughts about problems that they want to see solved.

    We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body's functions, movements, emotions and thoughts. But a brain can mean so much more.

    A brain can also simply be a smart person. If a person is called brainy, he is smart and intelligent. If a family has many children but one of them is super smart, you could say, “He's the brains in the family.” And if you are the brains behind something, you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft.

    Brain trust is a group of experts who give advice. Word experts say the phrase “brain trust” became popular when Franklin D. Roosevelt first ran for president in 1932. Several professors gave him advice on social and political issues（问题）facing the U.S. These professors were called his “brain trust”.

    These ways we use the word “brain” all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word “drain”. As a verb, to drain means to remove something by letting it flew away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.

    However, if people are responsible for a great idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.

    If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make some accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way.

Holidays are the main times to see both sides of my family.

    At Thanksgiving, my mom, dad, brother and I go to my dad's side of the family, my grandpa's. When I was in 2nd grade, my grandma got in a car accident only miles from their house. At the time, I was in school. I was checked out and brought to church. Since then, holidays have never been the same. However, Thanksgiving is still good, although it would be better with grandma. At my grandpa's house, my uncle, aunt, dad and mom all get the dishes prepared for the feast. When the final family members arrive, and the food is downstairs, we dig in, the little ones first.

    Christmas is a little different. We have Christmas with my mom's side at my uncle's house, usually on Christmas Eve. We have dinner with homemade cupcakes for dessert, and relax until it is time to open presents. The kids get the most and we usually take a family photo. After everybody's gifts have been opened, my family say goodbye and go home.

    Easter has been a little different in the past few years. It started 3 years ago, when my family hosted my mom's side of the family. We put our dishes we made for the day on the counter. We kids go downstairs and play ping-pong or football. We are called up when everything is ready and begin eating. The kids go to a table in the living room, and the adults use the kitchen table. That is usually the Easter day for us.

    Each tradition gets better and better each year for some reason. I wonder what new traditions my family might come up with in the coming years.

    Microsoft has developed a new smartphone 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 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 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 is then able to predict the word or sentence they are trying to say.

    Zhang's research, Smartphone-Based Gaze Gesture Communication for People with Motor Disabilities, is set to be presented at the Conference on Human Factors in Computing Systems in May.

    On the night of December 8, 1992, when he was standing in a parking lot talking to friends, Tracy March jumped to the top of a car, as he had done a hundred times before. This time, though, Tracy lost his balance. His head struck the ground, hard.

    All night, Cory, Tracy's mother, stood next to her son, who was lying in a hospital bed, his brown eyes fixed in a lifeless stare. She remembered that Tracy had once mentioned organ donation. Maybe I can spare another family this pain, she thought. When the time came, she and her husband Bill signed the forms permitting his organs to be donated.

    Tracy was declared dead the next day. Twenty-four hours later, in a Boston hospital, Tracy's liver was made part of my husband, David, who was suffering from a hopeless liver disease.

    Months later, we learned from the local organ bank that the donor's parents wished desperately to meet someone who had gained life through the gift from their son. A meeting was arranged by the organ bank to bring together two families linked by the most bittersweet ties imaginable.

    The meeting was risky, but worth it. We talked for 3 hours. They showed us a picture of Tracy. We learned how he had lived and died. We learned something about Bill and Cory too.

    For the Marches, seeing David and knowing he was well seemed to ease their suffering. I'll never forget seeing David's tall figure stopped over Cory, her arms around his waist, as a mother would hug a son. For a long time they held each other tight. It was hard to know if she was saying hello or good-bye. Maybe she was saying both.