Split the Difference
I frequently have my students play games as part of their learning sessions. Many students only want to play the games and do not think of creating a written records of the problems they are solving or notes on their learning. I ask my students to "split the difference" and go 50/50 on playing and note-taking. It's kind of a misnomer since there really is no "difference" to split, but the strategy makes it clear that my students should be splitting their time equally between playing a game and taking notes during that game.
Initially, the writing product was the major focus in my classroom. I noticed the products overall were not meeting grade level standards. Therefore the focus shifted to the writing process and doing each part of the process well. Giving students the opportunity to choose not only the place but also the pace at which they complete a prompt significantly changed the learning outcomes and products. A self-paced writing prompts give students the option to choose the order in which they will complete the writing prompts assigned for a unit of study. Making the writing prompts self-paced also gives students the freedom and latitude to simultaneously grapple with content and the writing process to produce a quality product.
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.
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.