Send one person from your group up to get the materials. You have 20 minutes to complete the activity and fill out your sheet. Some students begin to read their instructions while their partners go to collect the materials. The teams begin whipping their soap foam with eggbeaters, as instructed, and carrying out the required trials. What they are supposed to be doing seems very clear to all.
Most groups seem very focused on getting through the worksheet.
I can see some people checking the clock frequently to make sure they finish in the allotted time. There is little conversation in this room. Let's start with the smallest one. Much of the discussion is like this, tending to be centered on how to complete the task at hand. On the other hand, I also hear conversation of a different sort.