Checking room capacity

For each room you can define it's capacity - maximum number of students it can hold:

Then for each class(entire class) or for each group of students you can specify how many students are in it:

The software then check this capacity during the generation and it also can warn you if you manually put bigger class into smaller room:

Notes
- if you are using seminars(courses) you do not need to specify how many kids are in class/group the software knows this because it knows about individual kids