实际上，我们为学生购买了所有的在线教材，总共花费不到600万美元。

We actually have purchased all of the online textbooks for our students for just under $6 million.

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该公司补充说，与传统的纸质教材相比，其数字课程材料为学生节省了高达60%的费用。

Its digital course materials save students up to 60% compared to traditional printed textbooks, the company added.

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一位老师特别热衷于将色彩和图片引入数学教材，他认为这能让在卡通文化中长大的学生更容易理解这些内容。

One teacher was particularly keen to introduce colour and pictures into maths textbooks: he felt this would make them more accessible to pupils brought up in a cartoon culture.

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So this is all material for Yale students, Yale--material designed here at Yale for Yale students.

这些就是耶鲁学生使用的教材,在耶鲁大学为耶鲁学生编写的教材

耶鲁公开课 - 聆听音乐课程节选