Another great way to open the lines of communication is through your Google Classroom. While the idea of opening your stream up to students can feel a little overwhelming to some, I want to offer another suggestion that may feel a bit more manageable. Within your Google Classroom you can create a question for individual groups. Truthfully you do not even need to pose a question, it will just need to be a question assignment within classroom.
While creating the question you will want to ensure that you have allowed students to respond to one another. You can then assign this question to just those students in a group. You can repeat this for the total number of groups you have working. Once posted, students will be able to enter their Google Classroom and type their question, comment, or concern for group members under that given assignment. Other group members will then be able to join in the conversation by replying to what others have posted.
Please keep in mind, prior to being able to view other student responses a student must post their answer first. If you are concerned that not every student may have a question that will need to be posted, you can encourage students to post a generic message. This will then allow them to come back and view posts made by group members at any time, as well as respond to any comments that arise.
Again, this provides a great insight into student thinking and the work that is happening within the group. It also provides a wonderful discussion piece for one-on-one conferences, or small group conferences so that you can help guide students as well as coach them with the skills they need to be successful!