Spend the day with Gavin the Gator as he travels through his swamp looking for tasty numbers to eat. Swimming through the swamp, He's a skilled navigator. And o

This math concept book engages young readers through simple text and photos as they learn about comparing things in a group by more than and less than.

This is the first English translation of Thomas Harriot’s seminal Artis Analyticae Praxis, first published in Latin in 1631. It has recently become clear that

Introduces more than and less than as two monsters compare numbers at the monster fair.

Perry the Penguin needs 9 clams to buy an ice scooter -- but he's not very good at saving. As Perry earns, spends, finds, loses, and borrows clams, a simple lin