When Brother's class studies birds, the citizens of Bear Country end up choosing sides in a battle between environmentalists and those who want to cut down the trees in Birder's Woods to build houses.
Bothered by the fact that boys and girls are treated differently in the extracurricular activities at Bear Country School, Queenie McBear decides to get some changes made.
Brother and Sister Bear don't realize the problems they will face when they agree to help Professor Actual Factual's super-smart nephew fit in at school.
The bears in Bear Country grow concerned about how pollution and waste of natural resources are damaging the world around them, so they form The Earthsavers Club.
When she spills her milk, Sister Bear uses a new word she heard on a video, and a surprised Mama Bear explains to her that some words are not polite to use.
When the Bear Scouts meet Bigpaw, they can hardly believe their eyes. He's a King-Kong size bear! Is Bigpaw really dangerous? Or is he just a big old lovable bear?
The Bear Scouts work on their Scuba-diving Merit Badge, while trying to discover what is causing the pollution in Lake Grizzly that is making Old Jake, a very large catfish, sick.
Sister Bear interviews her grandmother for a school assignment, Gran decides to enter her old vaudeville act in the school talent show, and Gramps moves into the gardening shed.