30 books • 20 series
When There Were Dinosaurs (Math for the Real World) (Math for the Real World: Proficiency)
Exploring Pyramids Around the World (Math for the Real World) (Powermath)
Amazing Animals (Math for the Real World)
Amazing Animals: Multiplying Numbers by a One-Digit Number with Regrouping (Powermath)
The Skipping Book (Let's Get Moving)
New York and the New Nation (Primary Source of New York City and New York State) (Primary Sources of New York City and New York State) (Rosen Classroom Primary Source)