A 33-year-old financial analyst in California recently quit his job to devote hi

A 33-year-old financial analyst in California recently quit his job todevote himself to an unpaid job teaching math on the Internet, and his lessonsare reaching almost 100,000 people a month. Salman Khan’s voice is heard everyday on the net --- by tens of thousands of students around the world who arehungry for help learning math. He has posted 1,200 lessons on YouTube ...lessons that appear on an electronic blackboard, which range from basicaddition to advanced mathematics for science and finance. And they are free.

Khan lives in Silicon Valley, with his wife, a doctor, and their newbaby. He got the idea for his “Khan Academy” four years ago, when he taught ayoung cousin how to convert kilograms to grams. With Khan’s help, the cousingot good at math, and Khan began a new career.

Now, Khan records his lessons himself, but he never goes on camera. “Itfeels like my voice in their head. You’re looking at it and it feels likesomeone’s over your shoulder talking in your ear, as opposed to someone at theblackboard, which is distant from you,” he said.

When Springfield High School in Palo Alto, California invited Khan tospeak in person --- he immediately connected to the students there.

The idea of short lessons that can be played over and over againattracted high school senior Bridget Meaney. She says she had trouble with mathin the seventh grade. “I think the teachers are good, but they can’t teach at aspeed that’s perfect for everyone,” she said. “I like the idea of learningsomething in class but then going back and pressing pause or rewind andactually getting a deeper understanding of it.”

Originally, Khan kept his lessons short because of YouTube restrictions.Now, he thinks short is better. “Education researchers nowtell me that 10 minutes is how long someone can have a high level ofconcentration. And anything beyond that and your brain switches off,” he said.

For Khan, teaching math, science, and finance is just the beginning. Hesays he’s ready to expand his YouTube site to include other subjects as well.

1.What gaveKhan the idea of teaching math online?

A. His success in helping his cousin learn math.

B. His discovery that many students found learning math difficult.

C. A suggestion made to him at a local high school.

D. His interest in Internet teaching.

2.Why doesKhan never go on camera?

A. He’s too shy to show his face on camera.

B. It’s restricted by YouTube for education videos.

C. He wants to keep distance from the viewers.

D. He wants to create a more relaxed learning atmosphere.

3.From thepassage, we know that ________.

A. Khan travels to many schools to promote his lessons

B. Khan plans to include more subjects in the future

C. Khan gives live math lessons every day for free

D. Khan set up the Khan Academy with his wife

4.Why doesBridget Meaney like Khan’s lessons?

   A. Khanteaches seventh grade math better than her teacher.

   B. Thelessons can be watched repeatedly until fully understood.

   C. She canperfectly follow the pace of Khan’s teaching.

   D. Shecannot concentrate when learning in class.

5.What doesKhan mean by “short is better” in the 6^th paragraph?

   A. Keepingthe lessons short can ensure better concentration.

   B. YouTuberecommends short lessons for its site.

   C. Shortlessons encourage students to return to the website.

   D. Studentsenjoy short mathematics lessons more.

试题答案

【答案】

1.A

2.D

3.B

4.B

5.A

【解析】略