I use the Closing Bell strategy to bring my students back together as a community at the end of each class to check for understanding, debrief the class, give "grows and glows," and/or preview what we will be doing the following day. Building in this type of closing at the end of class is especially important in a blended classroom when students are spending so much time working independently or in groups.
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.
Once a day twice during a two-week unit, students will come back from their individualized assignments and group as cohort. This gives them opportunity to take their assessments as a class as well participate in full class discussions, mentoring, study sessions, and peer to peer advisory.
Opening Bell is a strategy I use to start class every day. I start by asking students to "clamshell" their computers--closing their devices almost all the way--and then I give a whole-class greeting. We spend the next two minutes checking the review section of the class agenda and preparing for the whole-class mini-lesson, announcements, and/or administrative tasks. Given that my students spend a significant portion of each class working independently or in small groups, Opening Bell gives us the opportunity to come together as a whole-class community before students start working on their own.