What do ostriches and penguins have in common? In this text, kids compare and contrast facts about these two kinds of flightless birds.

Work on subtraction in this short story about sharks who are mysteriously missing some teeth.

If you're looking for perfect practice for your advancing reader, this story has it all: strong characters, conflict, and a happy ending!

Work on science and reading at the same time in this digitally-savvy reading exercise that's all about our solar system.

Advancing readers can learn about the human body -- and practice reading, too -- in this two-in-one activity all about Rhianne and the way her body works.