Chemistry, earth science, and biology — start with the elements everything else is built from. More labs land here as they're built.
Every element, what group it's in, and where it actually shows up — plus a quiz mode to test what stuck.
Rock cycle, weather systems, plate tectonics — not yet built.
Cell structure, plant biology, ecosystems — not yet built.
tools/natural-sciences/[module-id].html matching its locked moduleId (e.g. periodic-table-lab.html). Rename on deploy if actual paths differ. Progress strip reads real Session Log Entry counts for the resolved member, same pattern as Electric Forge's hub — same open item: doesn't distinguish "wrapped up today" vs. "ever," and doesn't solve the ?member= handoff gap.