My co-teachers and I use a simple set of three rules to guide our blended classroom: 1. Respect all people, property, and ideas; 2. Follow directions the first time; and 3. Be prepared. The consistency of these rules is really important for middle schoolers and creates a great culture of learning in our House. We share these rules with students at the beginning of the year in a community-wide Town Hall Meeting.
During small group, I am able to give individualized feedback to my students. I want small group to be a safe place where my students can share, ask questions, and be able to learn content and skills authentically. This also gives me the opportunity to clarify misconceptions, to reinforce key learnings by giving my students one-on-one attention and support.
During Live Investigation and Task sessions (both teacher-led), I often use a whole group discussion format just like a traditional classroom. Blended or not, there is no substitute for discussion.