Coaching Session - Who's Engaged?

I recently completed a couple of classroom observations with student teachers who had identified student engagement as one of their personal learning goals on the action plan for the observed lesson. We agreed I would collect data on student engagement at five-minute intervals using an annotated seating chart.

Here's the diagram from one of the classes. Letters "A" through "H" mark students who I judged were not on task at at least some point during the five minute time index of the survey.

What do you notice? What questions do you have?

Here's the diagram from another class at a different school. The seating arrangement shifted mid-lesson when students began to work in pairs; these pairings are indicated as bolded connections on the diagram. 

Again, letters "A" through "H" mark students who were not on task at that time index of the survey. You can see a chronicle of this lesson below the chart.