There are presently 8 species of bear (In the family Ursidae) on Earth. The following classification is the most accepted.
Subfamily Ailuropodinae
Subfamily Tremarctinae
Subfamily Ursinae
In Ely, Minnesota there is an ecological reserve called the North American Bear Center. We encourage students to learn about the bears from this amazing reserve. We've been there several times before and the science staff is amazing.