Illustration is always used as an example to make the written text or the utterance more clear in general. In Winarski's opinion (1997), one picture equals thousands of words. That is to say, illustrations are capable to express the meaning of unfamiliar language or a great deal of information in the reading material by vivid pictures, tables,…

High-structure courses or flipped courses require students to obtain course content before class so that class time can be used for active-learning exercises. While textbooks are used ubiquitously in college biology courses for content dissemination, studies have shown that students frequently do not read their textbooks. To address this issue, we…