In case I wasn't clear, the teacher was not trying to palm off her teacher responsibilities or "threatening" to lower the curriculum. She wants the students to let her know if they are floundering so that she can help them. I did not interpret her letter as a threat, but rather reassurance that the curriculum can be adjusted. I am not even sure if that meant for everyong in the group or for those struggling kids. i am just thinking realistically that there are already three groups and it may end up easier to water down the curriculum for the whole group.