### Instruction:
What did Deneen do in her teens?

### Input:
In her teens in the 1880s, she taught school for a time in Sac County, Iowa. She studied at the Mount Carroll Seminary (later known as Shimer College), exiting in 1890. Although then as now primarily a liberal arts institution, the school also offered courses in stenography and typewriting. Deneen performed well enough in her studies to be hired as an instructor of these subjects in 1889 and 1890.

### Response:
In her teens, Deneen taught school in Sac County, Iowa.