71 Thus, no educational strategy that fails to recognize the centrality of the teacher’s decisions and actions can be successful. It is the teacher’s classroom plans and organization, sensitivity and responsiveness to all the children, and moment-to-moment interactions with them that have the greatest impact on children’s development and learning.72 The way teachers design learning experiences, how they engage children and respond to them, how they adapt their teaching and interactions to children’s background, the feedback they give—these matter greatly in children’s learning. And none can be fully determined in advance and laid out in a curriculum product or set of lesson plans that every teacher is to follow without deviation. Teachers will always have moment-to-moment decisions to make. To make these decisions with well-grounded intentionality, teachers need to have knowledge about child development and learning in general, about the individual children in their classrooms, and about the sequences in which a domain’s specific concepts and skills are learned. Teachers also need to have at the ready a well developed repertoire of teaching strategies to employ for different purposes.