The class of eighth grade at a Los Angeles middle school tap their rulers and nod their

The class of eighth grade at a Los Angeles middle school tap their rulers and nod their heads to the rhythm of the rap video shown on a screen. Their algebra teacher, LaMar Queen, uses rhyme to help them memorize seemingly difficult items to improve their grades.

Queen, 26, is now known at Los Angeles Academy Middle School as the rap teacher, but his fame has spread beyond the 2，200­student school in this neighborhood. He's won a national award and shown teachers and parents how to use rap to teach children.“Math is a bad word for many students, but if we put it in a form that kids enjoy, they'll learn，” Queen said. “Rap is what the kids respond to.They don't have a problem memorizing the songs at all.”

Queen's math rap came about by chance. Two months after starting at LA Academy, he was frustrated when kids said his class was boring. They thought that he looked like the singer Kanye West, so they challenged him to rap.

Queen has been rapping since the seventh grade. With his students' challenge on his mind, he pushed aside work on his lesson plans and wrote a rap song Slope Intercept.

Word of his rapping soon reached the school's main office. Principal Maria Borges went to look into it, and came out smiling.“It interests the kids，” she said.“Kids seem to know all the rap songs, and it's helpful for them to remember math rules.” “Some kids who aren't even in Mr Queen's class go around singing his songs，” said Kejon Closure, 13, who went from a C­average to an A.

In the raps, Queen defines a math concept and works through sample problems step by step. He keeps a relaxed manner when singing with his students. Queen also tries to inspire them. His lyrics tell students “to get As on your papers”，and “to be respectful and listen to your parents”．Sometimes the students appear in the videos as a reward for good grades and behavior.

20．According to the passage, LaMar Queen has been ________ since he began to teach students at Los Angeles Academy.

A．a popular teacher  　B．a music teacher

C．a mathematics teacher  　D．a famous singer

21．LaMar Queen has won a national award because ________．

A．he is good at composing rap songs

B．his new musical production was shown on TV

C．he created a unique teaching method in math

D．he gave students a lot of confidence

22．We can infer from the last paragraph but one that ________．

A．Queen's teaching method has been well received by both the principal and the students

B．Queen makes math easy and tries to inspire his students in the rap

C．Queen is willing to help the students who are not good at math

D．Principal Maria Borges doesn't think it a good way to teach math by rapping

23．This passage may be taken from China Daily in the column of ________．

A．society  　B．education

C．entertainment  　D．biography

美国洛杉矶的一位数学老师把复杂难懂的数学概念变成了说唱乐，从而让学生们如痴如醉地在数学公式里遨游。

20．C　细节理解题。根据文章第二、三段可知LaMar Queen在从教之初并不受学生欢迎，他用说唱的方式授课后才出名的，可排除A项。根据文章第一段Their algebra teacher(他们的代数老师)以及后文多次提到的“math”可知答案为C项。

21．C　推理判断题。根据全文尤其是第一、二段内容可知LaMar Queen教数学的方式与众不同，正因为他独特的教学方法使他获奖，故选C项。

22．A　推理判断题。题干中the last paragraph but one是“倒数第二段”的意思，注意审题。从校长调查到学生说的话可知LaMar Queen的教学被校长和学生认可。故选A项。

23．B　推理判断题。全文介绍LaMar Queen用说唱的方法教授数学，属于教育类文章。故选B项。