The document discusses the developmental perspective on education and teaching. The developmental perspective focuses on helping learners construct their own understanding by building on their existing knowledge and ways of thinking. Effective teaching from this perspective means planning lessons from the learner's point of view, using challenging questions to move students from simple to complex thinking, and adapting instruction to learners' levels of understanding. The teacher's role is to facilitate learning without undermining students' independent development of knowledge and use expertise to guide students as active participants in the learning process.