Question: What is the cost of Korean schoolchildrens digital textbooks?
About the article "South Korea", section "Education".

Candidate passages:
A digital textbook is a digital book or e-book intended to serve as the text for a class.
Digital textbooks may also be known as e-textbooks or e-texts.
Digital textbooks are a major component of technology-based education reform.
They may serve as the texts for a traditional face-to-face class, an online course or degree, or a massive open online course (MOOC).  
In the U.S., college and university textbooks are chosen by the professor teaching the course, or by the department as a whole.
Students are typically responsible for obtaining their own copies of the books used in their courses, although alternatives to owning textbooks, such as textbook rental services and library reserve copies of texts, are available in some instances.
In some European countries, such as Sweden or Spain, students attending institutions of higher education pay for textbooks themselves, although higher education is free of charge otherwise.
With higher education costs on the rise, many students are becoming sensitive to every aspect of college pricing, including textbooks, and in many cases amount to one tenth of tuition costs.
The 2005 Government Accountability Office report on college textbooks said that since the 1980s, textbook and supply prices have risen twice the rate of inflation in the past two decades.
A 2005 PIRG study found that textbooks cost students $900 per year, and that prices increased four times the rate of inflation over the past decade.
A June 2007 Advisory Committee on Student Financial Assistance (ACSFA) report, “Turn the Page,” reported that the average U.S. student spends $700–$1000 per year on textbooks.
While many groups have assigned blame to publishers, bookstores or faculty, the ACSFA also found that assigning blame to any one party—faculty, colleges, bookstores or publishers—for current textbook costs is unproductive and without merit.
The report called on all parties within the industry to work together to find productive solutions, which included a movement toward open textbooks and other lower-cost digital solutions.
Textbook prices are considerably higher in Law School.
Students ordinarily pay close to $200 for case books consisting of cases available free online. 
Though many governments and school districts are making large investments in digital textbooks, adoption is slow.
According to data from Bowker Market Research, in the spring semester of 2013, only 3% of college students used a digital textbook as their primary course material.
In multiple studies, strong majorities of college students, teens, and children continue to express a preference for printed books.
Furthermore there is conflicting information about how digital textbooks affect learning, cognition and retention.
However, students are growing more exposed to digital textbooks, and new research suggests that student performance is about the same whether students work from digital or printed texts.  
"What Is Love" is a song by South Korean-Chinese boy bands Exo-K and Exo-M, from their debut record "MAMA".
Available in both Korean and Mandarin, the song was released for digital download from the iTunes Store and other Korean and mainland Chinese online retailers on January 30, 2012. 
Shin Chaeho was the first historian to focus on the Korean "minjok" (or ethnicity), and narrated Korean history in terms of its "minjok" history.
For Shin, "minjok" and history were mutually defining and as he says in the preface of the" Doksa Sillon", “if one dismisses the "minjok", there is no history.” Shin emphasized the ancientness of the Korean "minjok" history, elevated the status of the semi-legendary figure, Dangun, as the primordial ancestor of the Korean people and located the host "minjok", Puyo.
Shin launched a vision of the Korean nation as a historically defined "minjok" or ethnicity entity.
In an attempt to counter China's controversial Northeast Project and Goguryeo controversies that ensued, the South Korean government in 2007 incorporated the founding of Gojoseon of the year 2333 BCE into its textbooks.
In 2006, the South Korean government incorporated the founding of Gojoseon of the year 2333 BCE into its textbooks.