2. 外语
  3. For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. "While we

For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. "While we

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问题    For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. "While we teach, we learn," said Roman philosopher Seneca. Now scientists are bringing this ancient wisdom up-to-date. They’ re documenting why teaching is such a fruitful way to learn, and designing innovative ways for young people to engage in instruction.
   Researchers have found that students who sign up to tutor others work harder to understand the material, recall it more accurately and apply it more effectively. Student teachers score higher on tests than pupils who’ re learning only for their own sake. But how can children, still learning themselves, teach others? One answer; They can tutor younger kids. Some studies have found that first-born children are more intelligent than their later-born siblings (兄弟姐妹). This suggests their higher IQs result from the time they spend teaching their siblings. Now educators are experimenting with ways to apply this model to academic subjects. They engage college undergraduates to teach computer science to high school students, who in turn instruct middle school students on the topic.
   But the most cutting-edge tool under development is the " teachable agent" —a computerized character who learns, tries, makes mistakes and asks questions just like a real-world pupil. Computer scientists have created an animated (动画的) figure called Betty’s Brain, who has been "taught" about environmental science by hundreds of middle school students. Student teachers are motivated to help Betty master certain materials. While preparing to teach, they organize their knowledge and improve their own understanding. And as they explain the information to it, they identify problems in their own thinking.
   Feedback from the teachable agents further enhances the tutors’ learning. The agents’ questions compel student tutors to think and explain the materials in different ways, and watching the agent solve problems allows them to see their knowledge put into action.
   Above all, it’ s the emotions one experiences in teaching that facilitate learning. Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else’ s accomplishment.
What do students do to teach their teachable agents?
选项 A、They motivate them to think independently.
B、They ask them to design their own questions.
C、They encourage them to give prompt feedback.
D、They use various ways to explain the materials.
答案D
解析 细节题。原文倒数第二段第二句话指出，教学代理的问题强迫学生老师用不同的方式思考和解释教学资料。由此可知，学生们为了教会教学代理，采取了不同方法来解释教学资料，故答案为D。A、B、C三项原文均未提及，故排除。
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