Title: Help Me Learn Addition, Author: Jean Marzollo
Title: Monster Musical Chairs: Subtracting One (MathStart 1 Series), Author: Stuart J. Murphy
Title: Leaping Lizards: Counting (MathStart 1 Series), Author: Stuart J. Murphy
Title: Double the Ducks: Doubling Numbers (MathStart 1 Series), Author: Stuart J. Murphy
Title: The Action of Subtraction, Author: Brian P. Cleary
Title: Quack and Count, Author: Keith Baker
Title: Subtraction Action, Author: Loreen Leedy