“The desire of the child to attain an end which he knows, leads him to correct himself.”
A clear goal can support self-correction because the learner can compare the result with the intended end and revise without waiting for every error to be externally identified.
Source note: Dr. Montessori's Own Handbook, discussion of self-correcting didactic material. Project Gutenberg #29635. Montessori immediately describes the child’s own intelligence, rather than the teacher, as detecting and correcting the error.