Mr. Harris taught sixth-grade science. On the first day of class, he gave us a talk about an animal called" birdcat", which died out during the Ice Age. He passed around a skull（头骨） as he talked. We all took notes carefully and later we had a test.

    When he returned my paper the next day, there was a big red"×" through each of my answers. I failed! There must be some mistakes! I wrote down exactly（确切地）what Mr. Harris had said. Then I learned that everyone in the class had failed. Why? "Very simple, "Mr. Harris said, "I made up all that 'birdcat'. But there had never been any such animal. So the information in your notes was not correct. Did you think you would get good grades for that?"

    However, we felt that was unfair. What kind of a test was this? And what kind of a teacher was he?

    Mr. Harris added, "I have told you many unbelievable things about this animal, such as the size, the color, but none of you have questioned. I hope you will learn something from this lesson. Teachers and textbooks are not always correct. In fact no one is." He also told us not to let our minds go to sleep, and to speak up if we thought he or the textbook was wrong.

    Up to now Mr. Harris' class gave me and my classmates something just as important: to look people in the eye and tell them they are wrong.

    Tyler was a troublesome student. He sat in the back row. Every time I called him to answer questions, he'd reply with a flip(轻率的)answer. If he got it wrong, he would get very angry.

    Usually kids could sit quietly in class. However, Tyler was just loud. One day, Tyler was talking while I was teaching. I said to him, "Tyler, why not join in our discussion instead of having one of your own?" He got up from his chair, pushed it over, and shouted something I can't remember. I sent him to the office and he received a week's out-of-school punishment.

    The week was a wonderful time for me, but when it came to an end, I began to feel worried. So I came up with a plan. On the day of his return, I told him I wanted to start over with him. If he felt like he was going to lose control in class, he could step outside the door for a moment.

    From then on, Tyler was a changed student in my classroom. In fact he was a smart child and he even stopped a fight between two students one day. And he never used the privilege(特权)to leave the class for a moment. I believe that just letting him decide for himself made all the difference. When the year was over, he wrote me a thank-you note about how good the year had been for him. I still have it today and find it very moving to reread when I get stressed about teaching.

    One day a young man was standing in a crowded place, shouting that he had the most beautiful heart in the world. Most of the people who saw his heart were amazed at the beauty of his heart. It had no little flaw (瑕疵).

    Suddenly, an old man appeared and said, "Oh, my son, your heart is not as beautiful as mine."

    The old man showed his heart to the young man. It was beating strongly, but full of scars. It had places where pieces had been removed and other pieces put in. But they didn't fit quite right, and there were gaps and rough(崎岖不平的) edges. Some places have never been filled in.

    The young man laughed, "My dear old man,   ▲   Comparing your heart with mine, mine is perfect and yours is full of scars."

    The old man said, "Dear boy, my heart is just as beautiful as your heart. You see, each scar shows where I have given my love. Sometimes people give me a piece of their heart back, and it fills the space as best it can. Other times, I give my love and get nothing in return. Those are the empty spaces. They hurt, but they show me that I can love and love again. "

    The young man stood still. His eyes were filled with tears. He walked up to the old man, tore a piece of his heart and gave the piece to the old man.

    The old man placed it in his heart, and then took a piece from his old scarred heart and placed it in the wound in the young man's heart.

The young man looked at his heart, not perfect anymore but more beautiful than ever.

It has been eight years since US astronaut Scott Kelly and Russian astronaut Mikhail Kornienko returned to the earth after living on the International Space Station(ISS) for 340 days. Times goes quickly, but it still means a lot as it is a record-setting journey — the longest time humans have spent living on the ISS.

▲Here is a small part of the book.

"I Can Look Down on the Earth"

From the ISS, I can look down on the earth. Some parts of the world are covered by gases(气体) from factories and cars. These parts make the earth look sick.

But one of my favourite parts is the Bahamas, which are islands in the Atlantic Ocean. The ocean is a mix of deep and light blues. I am lucky to see it.

"My Room Is Small"

I've been here for three weeks already. Sometimes, I wake up and think I'm upside down. My room is just big enough for me. I sleep in a sleeping bag. However, from the outside, the station looks like huge cans (金属容器) connected to each other. It is about the size of a football field.

"The Hardest Thing Is Putting On Socks"

Getting dressed is a bit hard when you can't "sit" or "stand", but I've got used to it. The hardest thing is putting on my socks. There is no gravity(重力) to help me bend(弯腰) over. I have no trouble deciding what to wear. I wear the same things every day.

A three-year-old boy's dream of flying like the Superman came true.

The boy is Luke Campbell. He's really 1 to see his dream come true. However, 2 unlucky about him is that he has serious heart disease（病）.He 3 going to hospital when he was just six years old. Now,even the doctors are not sure 4 he is able to live.

A charity（慈善机构） heard about Luke and5 to help him. When they asked him about his 6 ,he chose to fly as the Superman. It is because his7 always calls him "Mom's little superhero" or "Super Luke".

On that day,his mother helped him8 like Superman. With a rope and with a special machine（机器）,the charity made him 9 in the air just like the Superman. When Luke was flying, 10 smiled happily and said, "I'm flying on my own,aren't I?"

It was 11 to see him being so happy and enjoying himself,and there was no one there 12 .He 13 do anything he wanted.

His mother said, "The wish made Luke be a child for the day,away from 14 and doctors."

Luke isn't going to stay with his family forever（永远），15 he left a special day for them to remember.