You are right that eight year olds can't give each other the "correct" passphases to academic work in all cases. On the other hand that doesn't mean that the feedback isn't useful.
As far as spelling errors go, I see no reason why eight year old should be unable to find them. As far as style issues go, a eight year old has a much easier time to understand feedback from another eight year old than to understand feedback from an adult.
I think you may be overestimating the writing abilities of the average eight year old. When it comes to style issues, more third graders are in need of learning basic coherence than stylistic elegance.
I think that most of the Less Wrong population was probably at least somewhat precocious, which may make it hard to relate to what the average third grader needs to learn, as opposed to exceptional ones.
Having third graders attempt to correct each others' work sounds to me like trying to get white belts to try to correct each others' form in a martial arts class. Low level students may practice together, but you don't try to put them in a position of giving each other instruction until they achieve some measure of basic competence.
Having third graders attempt to correct each others' work sounds to me like trying to get white belts to try to correct each others' form in a martial arts class.
I haven't used the word 'correct'. A third grades should be able to give you an answer to: Does this sentence look coherent? Why do you think so? I see no reasons why he shouldn't be able to share the answer to those questions with his classmates.
If the teacher wants he can offer the correct solution afterwards.
As a teacher, I wonder if it is possible to instill this skill into students the skills of rationality and critical thinking. I teach the third grade, and it is not immediately apparent how to apply this with my own class.
The problems I foresee are as follows:
In the sequences, it is suggested teachers should drill into students words don't count, only anticipation-controllers. How practical is this for an elementary school level? Also appreciated would be any ideas or experiences on how to do this, or how to combat the above problems. Hearing from other teachers would be excellent especially.