Split group in two parts

[Holland95]

First of all, I'm living in The Netherlands, so I'm not good in describing in English. At the moment I'm trying to make an experimental timetable for my year (fifth of the secondary school).

My file: I've made 4 years (MathA, MathB, MathC and MathD) and 92 groups (each student has his/her one group). 40 of the 92 students are member of MathB, 46 students are member of MathA and 6 students are member of MathC. There are 11 members of MathD, but all of them have both MathB and MathD.

Because 40 students is too much for one group, there have to be two MathB-groups. In my example are there three groups: MathB with teacher A, MathB with teachter B and MathD with teacher A. All groups have 20 activities in a week. It's far from real, but that's now no problem.

My ideal situation: The group with MathD from teacher A and the group with MathB from teacher B will be timetabled at the same hours. But the students with MathD are not allowed to have two lessons simultaneously. Thus, the students with MathD will be placed in the MathB-group from teacher A. The other students with only MathB can be placed random in one of the two MathB-groups. Studets have to go to the MathB-lessons of teacher A or to the lesson of teacher B, not to both.

Can FET random divide a group from 40 students in two groups of students (with the names given), so that individual students don't have two subjects simultaneously?

Greetings from The Netherlands.

[Liviu Lalescu]

FET cannot choose randomly students, the user should input the exact structure.

Although, I heard some people using the notation: FET room=real teacher, to allocate activities to teachers (so, one FET room cannot have 2 activities at the same time).

But I don't think you need this trick. I think you should simply divide them manually. I would advise you to have a FET subgroup=a real student. Then, make groups, like:

Year 1
    Group Math A
    Group Math B1
    Group Math B2
    Group Math C
    Group Math D
    ...
    Group English A
    ...

You need overlapping groups. So, Group Math B1 and Group Math D (say D1 has lessons with teacher A) will have 11 overlapping subgroups (and Group Math D contains all these 11 subgroups and only these).

Also, Group English A will have overlapping subgroups with Group Math A, all the students who take Math A and English A.

Kind of difficult to enter manually, maybe you can solve using a custom converter.