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Plan 5 treats the original eight worlds as historical origins, not mandatory top-level navigation.

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Understand how things work—and how they got here.

ICU learning resources start with a specific question. Factual claims carry sources and check dates; uncertainty stays visible; diagrams are labeled as diagrams rather than evidence photographs.

4 published knowledge resources4 subject areas6 structured editorial formats

Published pilots

History + timeline

How the barcode became retail infrastructure

A history of how invention, scanning hardware, data systems and shared standards turned a printed pattern into everyday retail infrastructure.

11 min · researched synthesis

Comparative timeline

Timeline of Human Making

Compare 30 dated making-process milestones across five parallel tracks, with uncertain intervals and independent developments kept explicit.

Interactive · 30 milestones · source-backed synthesis

Interactive mechanisms

Motion, Mechanism and Kinetics Explorer

Manipulate 18 gears, cams, levers, linkages and motion-transfer models with ideal ratios, assumptions, static step states and source-visible research anchors.

interactive · 18 mechanism cards · conceptual kinematics

Editorial formats

Format follows the learning job.

These structures are authoring contracts, not empty page types that must be filled. New work publishes only when the subject, evidence and format justify it.

ExplainerAnswer one bounded question with definitions, evidence and limits.
How things workExplain a mechanism as a sequence or system without hiding important caveats.
HistoryExplain change over time using dated evidence and contextual synthesis.
TimelineOrganize verified dated events around a clear interpretive question, not a date dump.
Style atlasCompare visual or cultural features with explicit classification criteria and provenance.
Visual essayMake a visual argument in which every image has provenance and the text does analytical work.

Concept Library boundary

Learning resources can stand on their own.

These resources do not need a matching legacy concept to exist. The Concept Library remains available as a separate source-idea archive.

Browse Concept LibrarySearch learning records