Every lesson is the same for this unit, with only the first lesson perhaps needing modification to get students familiar with the system if they are not already.
All this requires is organisation. Get students to raise their hands to see where they are in the topic and organise your tables accordingly. Students are organised this way so they are always with people working on the same topic as they are. The exceptions here are students who are way ahead (which is fine, they can be lonely and challenge themselves) or students who are behind, who you might want to work with more closely.
Check in with tables throughout the lessons to answer any questions the groups might have. Use the peer assessment buttons the site to see the quality of the work students are submitting this and use it to target students who might be struggling.
End of lesson
Perhaps get students to reflect on how they are doing in comparison to their timeline, or have them think about what they need to do next lesson to get where they are aiming to be.
Monitor progress through the site, and by moving around and talking to students about their learning.
Try and ensure when you talk to groups you are ensuring everyone gets it, and one student might not be getting left behind.