Final answer:
The question does not specify which subjects textbooks avoid, but implies that textbooks need to be inclusive, updated, and balanced in their visual content to enhance student engagement and learning. Broadening the range of subjects in studies about textbook availability and reflecting on textbook content can address this issue.
Step-by-step explanation:
The question pertaining to which three subjects textbooks avoid at all costs cannot be distinctly answered as it is not entirely clear what subjects are being referred to. However, considering the information provided, it is evident that the college newspaper reporter's study into the availability of college textbooks revealed several biases. First, the reporter's sample was not representative of all college subjects since it focused exclusively on mathematics and science domains and omitted areas such as the humanities and business. To generate a study with more valuable conclusions for college students, the investigator could broaden the range of subjects and include books beyond the most popular within each category.
Additionally, from the anecdotal evidence provided, many students find textbooks with an overabundance of images distracting which affects their study patterns. Conversely, textbooks lacking enough visual content are also not engaging. Therefore, finding a balance in textbooks that aid learning without causing distractions is key.
Last, textbooks in use within academia may become outdated and may not meet the students' current educational needs. This kind of concern points towards a dynamic where curricula consultants, like Malcolm Green, have a significant role in determining which textbooks are employed to ensure the information is current and relevant.