When selecting a textbook for learners, which factor is NOT important to consider?

When selecting a textbook for learners, considering relevance and timeliness ensures that the content is up-to-date and applicable to current practices within the field. This is crucial in cosmetology, where trends, techniques, and safety standards evolve rapidly.

Additionally, evaluating student level and credibility of the text helps ensure that the material is appropriate for the learners' comprehension and that the information comes from a reputable source, which enhances the quality of education provided.

The organization and layout of the textbook also play a significant role in facilitating effective learning. A well-organized textbook can help students navigate through the material more easily, making it less daunting and enhancing the overall learning experience.

Popularity among teachers, while it might indicate that a textbook is widely used, does not guarantee that it is the best choice for every class or learner's needs. Instructors should focus more on the aforementioned factors that directly impact learning outcomes rather than the popularity of a textbook. Therefore, this factor is less critical in the decision-making process when choosing instructional materials.