情境示例每年的秋季学期,Avi博士都会开设一门有关中东历史的课。目前,她所能找到的有关中东历史的一本教科书对于这门课已经够用,但她也发现,这本教科书在帮助学生理解中东地区的一些问题上并不全面,而且,这本书相当贵——需要150美元。因此,本学期,Avi博士决定放弃以往使用一本教科书上课的方式,而使用开放性的“教材”——在线收集的材料。通过这一方式,Avi博士不仅可以使用原先她所选择的那本教材的内容,还可以运用从其他地 Examples of Context Each fall of the semester, Dr. Avi runs a course on Middle Eastern history. At present, a textbook she can find about the history of the Middle East is enough for this course, but she also found that the textbook is not comprehensive in helping students understand some of the issues in the Middle East and that the book is comparable Expensive - $ 150 needed. So this semester, Dr. Avi decided to abandon the way of using a textbook class in the past, instead of using open “textbooks” - materials collected online. In this way, Dr. Avi can not only use the content of the textbook she originally selected, but also use other