Misconceptions: Students have difficulty distinguishing between the Broadcast and Say blocks in Scratch.

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  • Broadcast triggers specific scripts, and can be used for more purposes than the Say block because the Say block simply places a speech bubble above the sprite.
    • Even though students had learned the Broadcast block, they would accidentally use the Say block. This may be because the Broadcast block is more complex as it involves multiple parts.
  • The "broadcast( )" block requires a corresponding "when I Receive( )" block, which triggers specific scripts that are written underneath it.
    • In the following code, when the user clicks on the green flag, the program broadcasts init. The "when I receive init" block receives this broadcast and sets MyID to s1.
      After the green flag is clicked, the program broadcasts init. The
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