Kaitlin Riffel's dream to end poverty（贫困） started when she was visiting her father，who worked for the homeless．

    "I never realized there were people in the world who didn't have a home or food before，"said Kaitlin，who is now sixteen．"I knew there was something I had to do about that．"

    At age eight，she started raising money to build a playground．"It took me two years，"Kaitlin said．"We started small．We wanted to do something to make a difference．"

    In 2014，When Kaitlin was thirteen，she visited Central America，and saw people going hungry and families living in houses made of cardboard．That year，we set Kids on a Mission，which has helped hundreds of people there．

    "The rooms were smaller than my bedroom，but there would be eight people living in each one，"Kaitlin said．"We also got to see the dirty rivers that those people were drinking out of．"

    Providing clean drinking water，food and clothes for people living in poverty is now an important task for Kids on a Mission．"This young lady is changing the hearts of people，and also changing the world，"said the headmaster of Kaitlin's school．

    It was a Monday morning. As the teacher walked into the classroom, he heard a whisper, “Here's the teacher. I'm sure this boring fellow (家伙) is going to talk about how to use commas (逗号). ” It was a boy's voice and the teacher knew who he was. However, the teacher didn't get angry. He said nothing about it but he really began to talk about how to use commas, and then he wrote the following sentence on the blackboard, “Nick says the teacher is a boring fellow. ”

    The class laughed and Nick's face turned red. “Now，” said the teacher, “I'll tell you the importance of commas. ” He put two commas in the sentence, and then read, “ Nick, says the teacher, is a boring fellow. ”

    The whole class laughed again. Nick felt very surprised at first, then his face became much redder. Finally he couldn't help (情不自禁) laughing with the other students, too.