Whole Group Discussion
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.
I noticed that students both needed and wanted a quick and engaging introduction to content. Instead of simply asking what do you know about this topic students prior knowledge is activated through a often funny yet very informative video segment on a topic. These videos are great for introduciing Social Studies content because they take often large and abstract topics and make them accessible for students.
Even in a 1:1 environment it is essential to provide students with teacher feedback. Students in my class are submitting work electronically and receive feedback in the same format. The challenge has been (as with written feedback on paper) getting students to incorporate the feedback. Conferencing with students gives me the opportunity to have more facetime with students and deconstruct the feedback they have received. Giving students indivudal guidance makes the personalized classroom a reality because students are having a unique exchange with their instructor.
Anytime I can bring a student up for a demonstration it usually captures the other students' attention much more than I do. Having a physical connection can help with internalizing the mathematics.