International impact of The Dalton Plan

We have reports from hundreds of schools using the Dalton Plan
in Great Britain, Germany, Austria, Norway, Sweden, Holland,
Russia, China and Japan.
In each of the last three countries there are now over 1000 schools
which have put the Dalton Plan into operation, and in Great Britain
a much larger number.
from:
An explanation of the Dalton Laboratory Plan
by its originator Helen Parkhurst - 1926

The international impact of The Dalton Plan was huge during the
time of educational reform.
Already more than 10 years Dalton International is stimulating a
network of innovative initiatives. Sharing good practice and
exchanging brilliant and creative ideas.
The number of Dalton schools in Europe is growing exponentially.
But it is not that quantity but the quality of the education
that counts.