Concurrent events in code
Write, read, run and alter block-based code in which two or more scripts or characters run at the same time (concurrent events, e.g. started by the same event), predicting and testing the combined outcome and distinguishing it from steps that run one after another
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Concurrent events in code means practising the idea at the table with a simple screen-free or sandbox check. We will demo once, then your child tries.
Materials: Paper command cards (forward, turn, repeat) OR a free visual-blocks editor preview; Pencil. 1. Say the goal of Concurrent events in code in plain words once. 2. Adult lines up three command cards into a short sequence that reaches a goal. 3. Child builds three short sequences (or edits one) and tests whether the goal is met. 4. Fresh check: one fresh sequence that reaches the goal. Record and stop. Done: three tested sequences with pass/fail noted. Proof: parent note of examples and results. Stop: End after the fresh check; keep optional challenge for another day.
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Start practiceConcurrent events in code practice
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CS Unplugged · Practice link — not the full lesson
Topics
Before you open · source notes
Free computing activity hub useful for Concurrent events in code. An adult picks one activity; not a single graded exam.
Free activity pages, no sign-in required for the tested path.
Before you openAsk the learner what steps they followed and what they would try next.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public CS Unplugged page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
CS Unplugged. “Topics.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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Check understanding
- Write two scripts that start on the same event so two characters move at the same time, run the program and check that both happen together
- Read a program with two scripts that run at the same time and predict what is on the screen at a given moment, explaining how this differs from putting the same blocks one after another in a single script
- Alter one of two concurrent scripts (e.g. change a wait or the number of steps) and explain and test how the change affects what happens together
“In a coding app like ScratchJr, can your child make two characters move at the same time, and explain what changes if one of them waits a bit longer?”
Curriculum record
- Type
- Procedural
- Subject
- Computing
- Domain
- Algorithms & Programming
- Age range
- Ages 7–13
Standards