HarperCollins

Let's-Read-and-Find-Out Science Level 2

The middle half of these books measure 530L–600L, and run around 1,000 words — calculated from the 36 titles at this level with a Lexile measure, not from the number on the cover.

Books
40
Lexile range
530L–600L
Typical length
~1,000 words

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When this level runs out

The next number up is usually a bigger jump than it looks. Browsing by measure instead keeps the difficulty steady while the books stay new.