Celebrate diversity, math, and the power of storytelling with this bilingual (Spanish and English) edition! Tyson is the youngest, smaller than his four older brothers and always trying to keep up. But when the family’s pet gerbil, Swish, goes missing, it’s Tyson to the rescue! Tyson uses his knowledge of doubles, triples, and sizes to figure out a clever way to reach his beloved pet. A playful exploration of proportional thinking, featuring Black characters and an author letter about the ubiquitous nature of math.   Tyson es el más joven y el más pequeñito de cuatro hermanos. Siempre está tratando de seguirles el ritmo. Pero cuando Swish, el gerbo de la familia, se pierde, ¡Tyson es el que va al rescate! Tyson aplica lo que sabe sobre dobles, triples y tamaño para planear de forma inteligente cómo encontrar a su mascota. Este cuento es una exploración entretenida del razonamiento proporcional, presentando personajes afroamericanos e incluyendo una carta de la autora sobre la naturaleza ubicua de las matemáticas. The Storytelling Math series shows that all children can be mathematical thinkers. Each book includes ideas for exploring math at home with your children and was developed in collaboration with math experts at STEM education nonprofit TERC, under a grant from the Heising-Simons Foundation.