Formal transitions happen twice during a double-block period. My students have to move from one section of my extra-large classroom (3 classrooms merged into one) and move to another section for a new lesson with a new teacher. My students have two minutes to transition from session to session, and we play a variety of interesting music on the surround sound stereo system to keep it fun.
Like It-Love It-Gotta Have It is a strategy I use to differentiate assignments within my micro-groups in a Live Investigation. The three names are, in my opinion, a better way of saying high, medium and low. The kids really love the names. In a Live Investigation, there is usually varying levels of abillity or knowledge in that particular skill. By making a high, medium, and low activity, students have the ability to challenge themselves at their own level. I assign different parts of the room for each activity so I can physically see where the students are. Most of the time, I let the students self-assess and they move throughout the room according to which level they are. They are free to move (up or down) from one section to the next. Most of the activites I assign here are digital. I really like using Khan Academy here, as I can track students physically as well as digitally. With this strategy, I can also target the students at the Like It level and allow the Gotta Have it students to fly a bit on their own.
During an Independent Learning Zone session, every student in my blended classroom is working independently on a different set of problems. It's impossible for me to be an answer key for 25 different students doing 25 different problem sets, so I print out their respective answer keys in advance and give each student his or her about 5-10 minutes into the period. This empowers them to monitor their own academic performance and self-correct as they are completing their assigned task.
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.