The estate of her benefactor Josephine Porter Boardman, was also near the town of Dalton and from this beginning the Laboratory Plan and school eventually took their names.

[5] Enlarged and modified through the years, Dalton still celebrates many traditions like lighting candles before winter break and holding a Greek Festival.

[citation needed] Academically, the school still subscribes to the Dalton Plan, which Parkhurst helped to create.

In 2010, a financial aid budget of $6.5 million supported an outreach program for socio-economic diversity at the school.

[22][23] In 2020, Dalton found itself in controversy during the broader diversity, equity, and inclusion movement that followed the murder of George Floyd.