What is the source of Gooru content? Who authors c?

In addition to the contributions of educators around the world, Gooru indexes and organizes millions of resources from more than 500 publishers that cover a range of K-12 topics such as math, science, English language arts, and social studies. Publisher sources include the Smithsonian, WolframMathWorld, the Library of Congress, National Geographic, PBS Kids, NBC Learn, Scholastic, ReadWriteThink, Time4Writing, and many more.