This screen allows you to configure mutually exclusive groups.
In the above example, 'Tech - 8a' and 'LO - 8a' cannot take place on the same day, however, on the day that 'Tech - 8a' is taught, any of the other groups could occur.
The same goes for 'Tech - 8b' & 'LO -8b' and 'Tech - 8c' & 'LO -8c'.
Below, you can see one of the possible outcomes.