I teach in a K-6 school which was a K-5 school last year. I can now say that I feel strongly that it should be K-5, 6-8, 9-12. 6th graders do not belong in the same building with the younger kids. At the same time, 9th graders do not belong with the 6-8th graders either! I completely agree with the middle school/intermediate concept, not the jr. high concept.
where I went to school, they just decided to house 5th grades separately from all other grades...that is effed up