Final answer:
Textbooks offer a means of realizing knowledge and learning in education.
Step-by-step explanation:
The obvious means of realizing what in education is offered by textbooks is the acquisition of knowledge and learning. Textbooks provide information, explanations, and examples that help students understand various subjects, such as Mathematics, History, English, Biology, Chemistry, Physics, and more. They serve as valuable resources for students to study, prepare for exams, and gain a deeper understanding of the subject matter.