After school on a Wednesday, 45 elementary school students clustered in a classroom at Aspen Academy, eager to learn about an unlikely subject — rocks.
"This one's kind of smelly," Michelle Cauley, a third-grade teacher said while holding up a rock. "It's used to make medicine and fertilizer."
As the kids tried to determine which rock Cauley, the club founder, was describing, the students whispered, sniffed the jagged, yellow rock and wrote down observations.
"It smells like the swamp by my dad's house," one boy said.
"Is it sulfur?" a girl asked.
She was right. The room then puzzled over clues describing fluorite and granite. It was a typical afternoon for the Aspen Academy Rockhounds, a club of 60 kids with a passion for studying and collecting rocks.
Parents and students at the Prior Lake charter school say it's not just the topic that's enthralling, but the enthusiasm Cauley brings to every meeting.
"They've got a passionate leader in Mrs. Cauley," said Noah Levie, a parent of two Rockhounds. "She makes it relevant to them."