Read the revision notes one at a time, with a quick check after each one. Get one wrong and you can look back at the note and try again, then there's a final round of the ones you missed.
One- and Two-Dimensional Arrays
2D Lists in Python
Records and Strings
Records in a 2D List
Nested for Loops
Displaying a 2D List
Index-Based Iteration
For Loop Totals and Tracking
Searching a 2D List
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