Within the past few years we have been coming to measure education by a new standard, the standard of individual achievement. This means that we have begun to differentiate the abilities of children, and to estimate the success of school work, not in terms of a general standard, but in terms of what each individual is able to do within the range of his own ability. Воспроизведено в оригинальной авторской орфографии издания 1912 года (издательство "The Davis Press"). Это и многое другое вы найдете в книге School Organization and the Individual Child (William Henry Holmes)