In chapter 11, I think that having group conferences is a good idea. It would save time, as well as giving students the opportunity to collaborate with their peers, and figure out how to make themselves better writers. On the other hand, by doing group conferences, you lose that one-on-one time, which can be very valuable. So, group conferences can be useful, but more than likely, students will benefit more from one-on-one conferences.
In chapter 12, rubrics are mentioned. I think that rubrics are very useful tools, and they help students know what to include in their writing to meet all expectations, instead of just writing, and hoping that they are fulfilling the teachers wants. However, I feel like rubrics can also be stressful on students, in some cases. Students might feel like there is something on the rubric that they don't know how to cover, and it might affect their writing, if they are worried about meeting everything on the rubric.