Therese M. Shea 
Discovering STEM at the Zoo [PDF ebook] 

Zoos are places where STEM comes to life, including the science of caring for animals, the technology used in zoo security, engineering that keeps habitats habitable, and the math used to calculate ticket sales. Readers are encouraged to draw connections between the STEM subjects they learn in school and the way STEM is used in the real world. This curricula-driven text uses high-interest subjects to discuss STEM and also covers the STEM careers that help zoos around the world run successfully. Fact boxes and colorful images provide opportunities for additional learning.