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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Knowledge-graph map

Computing
Mastered Ready to learn LockedHover a node for its description · click to open
Computers in Everyday L…Computers in Everyday Life — frontier Identifying computers in everyday life — not just laptops but phones, tablets, smart speakers, traffic lights, washing machines; what makes something a computerReal-World RobotsReal-World Robots — locked What a robot really is — not the sci-fi version; robots in factories, robot vacuum cleaners, robot arms in surgery; that robots follow instructions given by peopleSmart Versus Not-Smart…Smart Versus Not-Smart Devices — locked Sorting objects into 'smart' (can sense and respond) and 'not smart' (just sits there); a toaster vs a smart speaker; introduction to the idea that some machines can sense and respond to the worldStep-by-Step Instructio…Step-by-Step Instructions — locked Step-by-step instructions for everyday tasks (making a sandwich, brushing teeth); that if instructions are wrong or missing, things go wrong; computers follow instructions exactly
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Hyphens in Prefixed Words

English · Grammar & Punctuation · procedural

Use hyphens to avoid ambiguity in compound modifiers and prefixed words, distinguishing between meanings that change based on hyphen placement

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What mastery looks like

  • Distinguish between 'man eating shark' and 'man-eating shark' by adding or removing hyphens
  • Use hyphens with prefixes to clarify meaning such as 'recover' versus 're-cover'
  • Apply hyphens correctly in compound adjectives before nouns such as 'well-known author'

Check your understanding

Can Hyphens in Prefixed Words explain why "a man-eating shark" and "a man eating shark" mean completely different things — and use a hyphen correctly in their own writing to avoid that kind of confusion?

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