From the playful Golden Retriever to the tiny Chihuahua, dogs have been loyal companions to humans for thousands of years all around the world. With over 200 breeds, dogs come in many different sizes, ...

Salmon, a tenacious, ecologically significant fish, is most renowned for its incredible migratory journey from freshwater rivers to the ocean and back again. Their unique, remarkable cycle of life ...

Lesson Plans for high school and middle school include language arts, history, and science. Curricula in the language arts, social studies, and science tie content with character education. Both free ...