| Y/M/D | Description | Place |
|---|---|---|
| 1870/07/01 | First free kindergarten in the United States opens | Poppenhusen Institute, New York City |
| 1890/00/00 | Superintendent of Schools, Preston W Search, uses eight rooms in the Central School where each pupil will be able to advance at their own rate. This ungraded program is designed to benefit both gifted students and slow learners. | Central High School, Pueblo |
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