Coding Concepts: Concurrency Vs Dependency - Delve in, for twelve min!

UPDATE: The video tutorial has been removed due to essential maintenance! (It needs updating!) In the mean time, please feel free to explore the resources. The video will be up again soon.

These resources accompany Part 6 of my online CPD sessions, “Delve in, for twelve min!”

In this session, I highlight the issue of pupils using time as the trigger for sprite and background changes (concurrency), rather than making the sprites and backgrounds interact with each other (dependency).

Please watch the YouTube tutorial first, and use these Scratch projects as examples to secure your knowledge before you teach.

Please see for more resources, or to book me for your school’s computing CPD needs.


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  • Broadcast-between-sprites-and-background.sb2
  • Broadcast-animation.sb2
  • Make-a-block-animation.sb2

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Created: Jun 21, 2018

Updated: Jul 12, 2018

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sb2, 54 KB


sb2, 54 KB


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Creative Commons "Sharealike"

Creative Commons "Sharealike"