The document is an interactive math book about penguins that prompts the reader to:
1) Count 20 penguins shown and type the number.
2) Group some penguins and write a number sentence, such as 7 + 3 = 10 penguins.
3) Regroup the penguins and write another number sentence, such as 9 + 1 = 10 penguins.
4) Order the penguins from largest to smallest number and fill in a color by number page.