Girls at school like art, history and music. And boys like P. E. , math and computer science. It is what we always think. But the 12-year-old girl Hayliee in the US is not like that. She is good at art. Many of her pictures are welcome in her school. But Hayliee likes computer science best. She can write in code（代码） to let a model plane fly into the sky（天空）. She also learns that computer science can help us buy clothes, do sports and drive（驾驶） cars. For Hayliee, computer science also helps her make friends. Her classmates all like to be with her and they talk a lot about this subject.
On Sundays, she has computer science. Hayliee is a beginner（初学者）. Now she learns very easy things in the lesson. Hayliee's father is good at computer science. She always asks her father for help when she has questions. Hayliee says writing in code is not only about numbers or letters, but it also needs knowledge（知识） of different（不同的） subjects. Hayliee wants to learn computer science well. She knows that compute science is very useful. She says she must study very hard.
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