This document discusses assessment-centered teaching and the importance of using models of cognition and learning to design effective formative assessments. It introduces John Dewey's model of the thinking process, which involves a cycle of planning, implementing, observing effects, and revising based on results. The document emphasizes aligning instruction, assessment, and expectations of how students will progress. It presents Daniel Willingham's model of the relationship between environment, working memory, and long-term memory to demonstrate how formative assessments should be based on research about cognition and learning. The document suggests using and modifying cognitive models can help teachers better understand student thinking and learning difficulties.