Final answer:
Teachers using a set sequence of books and materials for teaching early reading are utilizing the basal approach, which is different from both direct instruction and discovery approaches.
Step-by-step explanation:
When teachers use a set sequence of books, materials, and activities to teach early reading, they are using the basal approach. This method focuses on a pre-determined and organized set of materials that are designed to teach reading in a systematic and step-by-step process. The basal reading programs often include a teacher's guide, workbooks, and reading selections that are leveled to progress in difficulty as students build their reading skills.
Direct instruction and discovery approaches are different teaching methods. Direct instruction involves a clear and straightforward teaching style in which the teacher provides information directly to students, and the discovery approach encourages students to explore and find answers on their own through hands-on activities and experimentation. The basal approach, with its structured sequence and reliance on specific materials, differs from these other strategies as it uses a comprehensive program for literacy development.