Building a Script
How to find a Blockly block in the toolbox by category or by search, drag it onto the workspace, stack blocks that do something, plug in blocks that give a value, and change the values they start with.
Working with Blocks
What a Blockly block's right-click menu offers - duplicate, comment, inline inputs, collapse, disable, delete and help - what the workspace's own menu does, how a block's tip explains it, and what a failed block looks like.
Variables and Functions
How to make a Blockly variable and set, change and read it, and how to wrap blocks into a function of your own that does something or gives a value back.
The Code Behind the Blocks
How to see the JavaScript a Blockly script turns into, with Export to runner, and copy or download it to run the script in your own web app.