The codes—which typically range in price from $80 to $155 per course—give students online access to systems developed by education companies like McGraw Hill and Pearson.

这些访问码的价格通常在每门课程80美元到155美元之间不等，学生需要通过这些访问码才能在线使用麦格劳·希尔和培生等教育公司开发的系统。

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In 1917, following the death of John Alexander Hill, James H. McGraw merged the McGraw and the Hill Publishing Companies.

1917年，John Alexander Hill逝世后，James h . McGraw将麦克·格劳出版公司与希尔出版公司合并。

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On November 26, 2012, The McGraw-Hill Companies, Inc.

FORBES: McGraw-Hill Unloads Education Business for $2.5 Billion

New York state and dozens of other states began to look for alternatives to the GED last year, and companies such as McGraw-Hill responded with proposals to create its own tests.

WSJ: Test Maker Pays New York State Students to Take a Trial Exam

Apple said it is partnering with several major textbook companies -- including Pearson, McGraw-Hill and Houghton Mifflin Harcourt, who will make e-books for the store, according to Fortune.

CNN: Apple: School should center on the iPad