My student has an issue with Blockly

Are you doing a Blockly problem but you can't run the code (the Run button is greyed out), even though the code looks correct? Very often that means there is a stray block somewhere in your workspace. Blockly code is only runnable if all the blocks are filled and joined. Scroll around the workspace and see if there are any blocks off to the side that aren't being used, and delete them!

If you are doing a Blockly problem and it is not working how you would expect, you can try to reset the problem back to the start state. To do this, you need to click the Reset button to the left of 'Save':

If this does not solve the issue, please contact us via

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