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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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Past, Present and Progressive Tense

English · Grammar & Punctuation · conceptual

Use verbs to convey past and present tense correctly and consistently, including the progressive form (e.g., she is drumming, he was shouting), understanding how tense indicates time

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What mastery looks like

  • Write a passage consistently in past tense without switching to present
  • Use progressive forms correctly: 'was running', 'is jumping' to show ongoing actions
  • Identify verbs in a sentence and change them from past to present tense or vice versa

Check your understanding

If Past, Present and Progressive Tense is writing about something that happened yesterday versus something happening right now, do they change the verb — for example, writing "she jumped" for the past and "she is jumping" for right now?

Prerequisites

Required first

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