How The Khan Academy Is Changing the Rules of Education
“This,” says Matthew Carpenter, “is my favorite exercise.” I peer over his shoulder at his laptop screen to see the math problem the fifth grader is pondering. It’s an inverse trigonometric function: cos-1(1) = ?
Carpenter, a serious-faced 10-year-old wearing a gray T-shirt and an impressive black digital watch, pauses for a second, fidgets, then clicks on “0 degrees.” Presto: The computer tells him that he’s correct. The software then generates another problem, followed by another, and yet another, until he’s nailed 10 in a row in just a few minutes. All told, he’s done an insane 642 inverse trig problems. “It took a while for me to get it,” he admits sheepishly.
Carpenter, who attends Santa Rita Elementary, a public school in Los Altos, California, shouldn’t be doing work anywhere near this advanced. In fact, when I visited his class this spring—in a sun-drenched room festooned with a papercraft X-wing fighter and student paintings of trees—the kids were supposed to be learning basic fractions, decimals, and percentages. As his teacher, Kami Thordarson, explains, students don’t normally tackle inverse trig until high school, and sometimes not even then.
Kami Throdarson uses Khan Academy in her fifth-grade class. Some kids are already learning calculus with it. Photo: Joe Pugliese
Stanford’s ‘Introduction to Artificial Intelligence’ course will be offered free to anyone online this fall. The course will be taught by SebastianThrun (Stanford) and PeterNorvig (Google, Director of Research), who expect to deal with the historically large course size using tools like Google Moderator.
There will two 75 min lectures per week, weekly graded homework assignments and quizzes, and the course is expected to require roughly 10 hours per week. Over 10,000 students have already signed up.
Americans are spending more and more on education, but the resulting credentials — a high-school diploma and college degrees — seem to be losing value in the labor market.
Americans who go to college are triply hurt by this. First, as taxpayers: state and federal education budgets have ballooned since the 1950s. Second, as consumers: the average college student spends $17,000 a year on school, and those with loans graduate more than $23,000 in debt. And third, as a worker: in 1970, an applicant with a college degree was among an elite 11 percent, but now almost 3 in 10 adults have a degree.
Given that a high school diploma, a bachelor's degree and even graduate school are no longer a ticket to middle-class life, and all these years of education delay the start of a career, does our society devote too much time and money to education?
