AI Constitution

Resources · Learning tool

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.

Sign in to track your progress and get personalized recommendations. You can browse freely below.

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
← Back

Written Multiplication

Mathematics · Multiplication & Division · procedural

Multiply two-digit and three-digit numbers by a one-digit number using formal written layout

Sign in to track this

What mastery looks like

  • Set out and solve 47 × 6 using short multiplication
  • Set out and solve 234 × 5 using short multiplication with carrying
  • Check the answer using estimation (e.g. 234 × 5 ≈ 200 × 5 = 1000)

Check your understanding

Can Written Multiplication work out '347 × 6' by setting it out formally in a column — multiplying each digit separately and carrying where needed?

Prerequisites

Required first

Unlocks (2 directly)