This pattern was deepened when , in 1920 , Bassett introduced the use of the Dalton Plan to the school .
The school 's first headmistress , Rosa Bassett , encouraged self - reliance and personal responsibility in the school 's pupils .
This pattern was deepened when , in 1920 , Rosa Bassett introduced the use of the Dalton Plan to the school .
The school 's first headmistress , Rosa Bassett , encouraged self - reliance and personal responsibility in the school 's pupils .