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.
2D arrays
Fixed-length arrays
2D array indexes
Building a 2D array
Processing one row or one column
Nesting
Visiting every element in a 2D array
Finding highest or lowest in a 2D array
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