他列出了为什么他觉得使用数字教科书很明智的原因。

He listed reasons why he thinks digital textbooks make sense.

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尽管使用的教育专业术语表述费解，但它们一般会附带一些明确数字：比如，使用哪些教科书及每个科目教多长时间。

But alongside are usually some hard facts: which textbooks to use and how many hours to devote to each topic, for example.

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加州开发了iPad代数应用的霍顿·米夫林-哈考特宣称，其计划比较使用数字化教科书与传统课本的考试成绩。

Houghton Mifflin Harcourt, which developed the iPad algebra program in California, said it planned to compare the test scores of students using a textbook in digital and traditional book formats.

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