Jodie, sounds like you figured things out. Each group of students will bring its own set of challenges so in the case you mention, you were able to focus the group activities during a time in class where after the group activity is over the students are reading to move on to the next class session. You can also establish some ground rules before the group activity even starts. You can even share with the students that the activity is so engaging that they will not want to break away from the activity but in order to achieve the course objectives, students must all agree that once a group activity is over, it is time to get back to other work. There are many techniques available. It will be interesting to come back to this post from time to time and read what others are doing with their group activities. Regards, James Jackson