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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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Comparing fractions (age 8+)

Mathematics · Fractions · procedural

Compare two fractions with the same numerator or the same denominator by reasoning about size; record comparisons with >, =, or < symbols

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What mastery looks like

  • Compare 3/8 and 3/4: same numerator, larger denominator means smaller pieces so 3/8 < 3/4
  • Compare 5/6 and 2/6: same denominator so 5/6 > 2/6
  • Justify a comparison using a visual model and explain why both fractions must refer to the same whole

Check your understanding

If Comparing fractions (age 8+) sees 3/5 and 3/8, can they tell you which is bigger just by thinking about the size of each piece — without needing to draw it out?

Prerequisites

Required first

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