For dino-lovers Mike and his little brother Andy, there's nothing as exciting as the Dinosaur Card Trading Fair. Andy's in heaven on his 7th birthday when Mom lets Mike take him for the very first time. Mike really wants a T. Rex card, but to get it, he's going to have to trade. He needs three Allosaurus cards to get a T. Rex, but has only one. This is going take some wheeling and dealing.

Helping children to comprehend the concept of equivalent values is key to their understanding of equations.

MathStart is an award-winning series by Stuart J. Murphy that teaches math through stories and visual models. Young readers find the stories engaging and relatable, because each story revolves around practical applications of the math concept being presented and features lively art from top-notch illustrators.

Charts and other visual representations help children understand how the math works and promote deeper comprehension. This unique combination of stories, illustrations, and visual models helps teachers and parents in the teaching of math and provides all children with the opportunity to succeed.

The 63-book series is divided into three levels with 21 books in each. The math concepts taught in MathStart books conform to state and national standards. Level 1 is Pre-K–Kindergarten; Level 2 is Grades 1–3; Level 3 is Grades 2–4. The series follows math topics across grades so there is a foundational path to learning that runs through the levels.