1,590 K–5 micro-topics wired into a 3,221-edge prerequisite graph. Search a concept and trace everything a learner must master before it — or explore the whole graph.
Select a topic to see its description, evidence, prerequisites, and what it unlocks.
scroll = zoom · drag = pan · hover = name · click = focus
laying out the graph…
Click a node to focus it — its prerequisites and dependents light up; the rest dims.
Ask a small AI about the taxonomy — “what should a child master before fractions?”, “trace the prerequisites of photosynthesis”, “what’s in Computing for age 6?”