“You can count faster when counting by tens. Let’s count by tens while these monarch butterflies get ready to fly south…” introduces this counting  / science book for young readers.

Each two-page spread contains a number line, counting by 10s to 100, running cross the bottom of both pages, plus an addition sentence (0+10=10, 10+10=20, 10+30=40, 10+40=50 and so on), with the focus number of that page highlighted. The foreground of each page spread has 10  large monarch butterflies to count.  The background has 10 monarch butterflies gathered per tree with the number of trees increasing by one with each  page turn. The sets of ten are distinct  and easily counted. ( I counted them all.)

Each turn of the page contains:  1) a butterfly action, 2) a science statement, and 3) “Count the monarchs by tens:  …”

The glossary adds to the science information presented in the book: examples- antennae, proboscis, and (wing) scale.