This document discusses using conceptual flow diagrams to develop the ideas of Ocean Literacy. Conceptual flow diagrams can help organize concepts from the Ocean Literacy Principles into a developmental scope and sequence. They differ from concept maps in that they address concepts within an instructional unit and show a hierarchy and sequence of ideas. The diagrams were developed for teacher professional development to improve content knowledge and instruction planning. They make key concepts and their relationships clear, and can guide curriculum and assessment development. The document outlines how to construct conceptual flow diagrams through a collaborative process to map important concepts, align them to standards and materials, and design an optimal instructional sequence.