Age-grading is a bad idea. It was imported from Prussia in 1848. It was first implemented in Boston, in the Quincy Grammar School. It was a cost-cutting device. It was also imposed to let teachers reduce discipline problems.
The rural "little red schoolhouse" did not adopt this model. There, students of all ages were in one room. A teacher taught them. The older students who understood the material helped teach the younger ones who were having trouble. (This is the RPC model: student tutorial forums.)
Read more about how the change was implemented for control of curriculum, teachers, and students. http://www.ronpaulcurriculum.com/public/319.cfm
The rural "little red schoolhouse" did not adopt this model. There, students of all ages were in one room. A teacher taught them. The older students who understood the material helped teach the younger ones who were having trouble. (This is the RPC model: student tutorial forums.)
Read more about how the change was implemented for control of curriculum, teachers, and students. http://www.ronpaulcurriculum.com/public/319.cfm