In high school textbooks, captions are even shorter than those in college texts, usually less than one dozen words. The caption often provides little direction for reading or interpretation of the inscription and in many instances themain text in high school textbooks does not even reference the inscriptions. In addition, captions are often no more complex for graphs than those provided for photographs and tables. In one high school textbook, the text relating to Darwin’s finches is embedded in a narrative about Darwin’s visit to and data collection on the Galapagos Islands; a photograph of one of Darwin’s finches accompanies this text. This photograph shows a dark-tan bird perched on a branch; the foreground and background are out of focus and provide little context. The caption consists of a twenty-word sentence and the main text refers to the diagram in two sentences in one paragraph. In a second paragraph the birds are referred to repeatedly in the course of a narrative that describes how Darwin came to notice the physical differences between the birds and contemplated if islands had endemic species. The text suggests that Darwin had the finches examined by bird experts many years later and it then related a series of questions for which Darwin was not able to provide answers for the following twenty years. The chapter continued with the development of his ideas about descent with modification and natural selection, but did not return to the differences between the finches or to the significance of the distribution on different islands.