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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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Acid Reactions & Salts

Science · Matter & Materials · conceptual

Describe and write word equations for the reactions of acids with metals, alkalis (neutralisation), and metal oxides/hydroxides, identifying the salt produced in each case

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What mastery looks like

  • Writes word equations for: acid + metal → salt + hydrogen; acid + alkali → salt + water; acid + metal oxide → salt + water
  • Names the salt formed from a given acid and base (e.g. hydrochloric acid + sodium hydroxide → sodium chloride)
  • Describes the test for hydrogen gas (squeaky pop)
  • Explains what neutralisation means and gives a practical example (indigestion tablets, treating acidic soil)

Check your understanding

If Acid Reactions & Salts was asked how an indigestion tablet works to relieve stomach acid, could they explain what type of chemical reaction is happening and write a simple word equation for it?

Prerequisites

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