To ascend means to go up.
The numbers 1, 2, 3, 4, 5 are in ascending order because they continue to go up.
Numbers in ascending order don’t have to be consecutive, as long as they go up. For example: 3, 10, 54, 69 and 102 are in ascending order.
The term ascending order might not be introduced until First Level but the concept of arranging numbers in a forward sequence would be introduced at Early Level.
CURRICULUM LINK:
I have explored numbers,
understanding that they
represent quantities, and
I can use them to count,
create sequences and
describe order.
MNU 0-02a
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Descending Order