You are right. TMS doesn’t need to know which students were in each group, only what the group size was and how many hours you interacted with each group. So, just like your first example, if you’ve taught 8 students in 4 pairs for 1 hour over 5 weeks then you would reflect this with one column:
Hours = 5, group size = 2, students = all
There is no need to create a column for each student pairing and then add the hours in, but the functionality does exist for you to create additional columns should you teach one group extra hours or maybe even combine two pairs for a group size of 4 for one session perhaps.
In that situation you would create:
Column 1 – hours = 4, group size = 2, students = all
Column 2 – hours = 1, group size = 2, students = a, b, c, d
Column 3 – hours = 1, group size = 4, students = e, f, g, h
TMS knows that you’ve taught every student for 5 hours, you’ve just combined them in a different way.
Further examples are listed in the TMS Information Guide for Tutors (available from the Quick Start Guide for Tutors web page).