simulators

Ideas you can poke

Each simulator teaches one syllabus idea by letting you drive it. No account needed; they pair with the theory pages on educs.me.

• A1.1.5

  The CPU cycle

  Step the fetch-decode-execute cycle register by register, in the order the syllabus expects you to know it, with the buses lighting up as data moves.

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• A1.2

  Binary & logic gates

  Flip real bits, race base conversions against your best streak, and prove the seven gates with truth tables you can test against a live circuit.

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• B2.4

  Sorting & searching

  Bubble, selection, linear, binary, one comparison at a time, with a predict-the-next-move mode that mirrors exam trace tables.

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• A2.3

  The packet journey

  One message, many packets, independent roads. Toggle loss, watch retransmission, and see out-of-order arrival reassemble itself.

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• A4

  Machine learning

  A growing suite of hands-on demos: build a k-nearest-neighbours boundary point by point, then meet the loan dataset where high overall accuracy still hides unequal outcomes between groups.

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Codes like A1.1.5 name the syllabus section (the numbered part of the course outline) each simulator covers, so you can match them to your notes.