Well, if not school, at least learning.
"...they never got so far as to learn that knowledge is delightful because one likes it; and that no effort at self-education can do anything until one has found out this supreme delightfulness of knowledge." ~~ Charlotte Mason, "Too Wide a Mesh," epilogue to Towards a Philosophy of Education
And in that sense, according to Charlotte Mason, the education of the Grenfell twins was a failure.
Check that off your list of standards.