The SLP Toolkit schedule automatically caps at four students per group so it doesn't overschedule a group for you. However, you can manually add as many students as you would like to a group using one of two methods!
To do this, drag the student who needs to be scheduled from the 'Service Times' area to an existing group. Alternatively, for larger groups, you can create overlapping time blocks by splitting students into smaller subgroups, creating separate blocks at the same time slot, and assigning students to the corresponding time blocks.
You may see that you cover up another student's name in the group when you do this, but all students in the group will show up correctly on the schedule printout and in the daily data agenda.