two subjects never in the same day

[raffaellacodermatz]

Hallo,
I need help.
I'd like to know which constraint I can put to obtain that two different subjects (english and maths, for example) don't never go in the same day.
Thanks so much for the help

[Liviu Lalescu]

Hello,

1) Use the constraint min days between activities. If you add A1,A2,A3,A4, and A5, min days 1, 100%, it considers that each pair must not be on the same day. This is the best approach.

or

2) Use the constraint students activity tag max hours daily, add a tag "Eng/Mat" to all English and Math activities.