Before each checkin, each team member should identify three specific items and add them to the sheet. Do this before meeting with me! In our meeting we will go over the items from the previous week to determine how much progress was made, and I will review the newly added tasks to make sure I understand what you're working on, and that the tasks represent an appropriate effort.
For the first checkin, please copy the first row (the "1/31-2/7" week) so that there is a separate line for each team member, with the associated team member's name in the "Owner" column. In the "Description" column add three one-sentence tasks that will already have been completed by 1/31. Add enough copies of the "2/7-2/14" row so that there's one for each team member and then add three new tasks for each member for the coming week.
For future checkins, you'll only need to add new rows for each upcoming week. Note that there are rows for weeks where we won't be doing checkins (e.g. the week of 2/14, and spring break week). It would still be good to document progress during those weeks even if we won't meet to discuss the spreadsheet until later.
Please note that these checkins are a graded component of the course. For the weekly checkins I will use a coarse scoring rubric, assigning each group a score of 0-5. To earn a 5 a group must prepare their sheet ahead of time with three reasonable tasks for each member, have made adequate progress completing tasks from the previous week, and show up on time for the checkin meeting.