John Lockyer 
Todo sobre los tiburones [PDF ebook] 
Unidades de medida (Units of Measure)

It doesn’t need to be Shark Week to learn all about sharks! Students will enjoy performing math functions as they read about sharks in this fascinating, fact-packed book. Concepts addressed in this classroom text include measurements and various units for length, weight, speed, and the amount of liquid consumed by a whale shark. Practice problems, math charts, and diagrams help students improve their measurement skills. This Spanish book includes a glossary, an index, engaging images, and easy-to-read text to help students build their math and reading skills.