Computers have been used in teaching for more than twenty years. But a new book says that only now are they changing education. And it predicts that a lot more is about to happen. 

The book is called "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." "Disruptive Innovation" is a theory developed by lead author Clayton Christensen, a professor at the prefix = st1 /HarvardBusinessSchool. He says organizations almost always use new, creative technology only to continue what they already do. 

New technology should change organizations, he says, and disrupt them in a good way. They should use the technology to do things differently--for example, to serve more needs. The book says the needed disruptive force in education is computer-based learning. 

Michael Horn, another author of "Disrupting Class", told us about a Bostonpublic that he visited. Every student at Lilla G. Frederick Middle School inDorchester,Massachusetts, has a laptop computer. One class was learning about storms. Michael Horn says the laptops made it possible to truly individualize the lessons, to divide materials by ability level and learning style. At the end of the class, the students all took part in a discussion led by the teacher. 

Computer-based learning offers a way for students to take advanced courses not offered at their school, or to retake classes they failed. It also serves those who cannot physically attend school, and students who receive home schooling. 

Computer-based learning includes online courses. Enrollments in online courses have grown sharply. In 2007, the United Stateshad about one million enrollments, not including college courses. Students could be enrolled in more than one course, through schools or education companies. High school students make up about seventy percent of the enrollment. Still, nationally, only about one percent of all high school courses last year were taught online. 

But the authors of "Disrupting Class"predict it will be ten percent in about six years. And their research suggests that the number will be about fifty percent by 2019. And Michael Horn says the future of online learning could be even greater in developing countries. QUESTIONS:

Q1:
1. Computers have been used for teaching for how many years, according to the article?
2. How many years have computers been used in teaching, according to the article?
3. 
Q2:
1. What is the title of the book that talk about how computers will change education?
2. The fact that computers are changing education is talked about in which book that is mentioned in the article?
3. 
Q3:
1. What is the name of the lead author that wrote "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
2. The book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." was written by which lead author?
3. 
Q4:
1. Is there an author other than Clayton Christensen that wrote the book "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
2. Was the more than one author that wrote the book "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
3. 
Q5:
1. What was said by Michael Horn about what laptop helped students do?
2. What did laptops help with, according to Michael Horn?
3. 
Q6:
1. Has the number of people that have enrolled in online courses increased?
2. Have the number of online courses enrollments increased?
3. 
Q7:
1. What is the percentage of high school students that are taught online?
2. Online teaching is used to educate what percentage of high school students?
3. 
Q8:
1. What percentage of high school students will be taught online in six years, according to the authors of the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
2. The authors of the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." believe that what percentage of students will be taught online in six years?
3. 
Q9:
1. What percentage of high school students will be taught online by 2019, according to the authors of the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
2. The authors of the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." believe that what percentage of students will be taught online by 2019?
3. 
Q10:
1. Are computers a needed disruptive force in education, according to the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns."?
2. Does the book titled "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." believe computers to be a needed disruptive force in education?
3. 
Q11:
1. What does computer based learning offer that is not normally offered in school?
2. What is normally not offered in schools but is provided thanks to computer based learning?
3. 
