Children are introduced to math concepts within familiar fairy tale settings. They journey with Mathella as she enters the world of characters such as Cinderella, Goldilocks, and the Three Little Pigs. Each book has worksheets that build and reinforce on concepts from the story. This series is best suited for k-5 grade.

In this adventure, Ella falls asleep while watching the Wizard of Oz. Somehow, she finds herself in Mexico where she meets Charro, who needs to keep his cattle inside a certain area, and the twins, Peri and Meter, who can only play outside or around the fence. By using math, Ella helps them solve their problems, but it will require teamwork for her to get home.

In this adventure, Ella's friend, Jackson, finds himself up a beanstalk where he must rely on his math skills to impress the giant. In order to get the prize, he has to convert between units and choose the appropriate unit of measurement. Students will delight in this story and its similarity to Jack and the Beanstalk. This book includes a worksheet and additional website resources to enhance and reinforce students' concepts of measurement.

In this adventure, Ella finds herself in a place where everything is out of order. With the help of her dog, Period, Ella helps the Decimal family stay in order. She creates a place value chart and assigns chores to each of the 9 children in the family. The value or amount of work each child completes depends on which child has the number. Students learn about the number system, decimals, and place value. This book includes worksheets to reinforce concepts taught in the story.

In this adventure, Ella and her dog, Integer, set out with a basket of goodies for Grandma. However, Integer is soon running back and forth which causes Ella to recalculate the distance. To add to her day, a wolf confronts her. Thank goodness for her red cape (or math) which helps save her from the wolf.