Maths in first period

[lavert]

I need mathematics in between 7:00 and 10:00, i select data, activities, then i set all activities, then  time,activities,set of activities has set of prefered time slot, then I put x on between 7 and 10 for 6 period, add and close,
when i click generate, my period stay different place eg. 13:00

how can i do this step by step
lavert

[Liviu Lalescu]

1) Select subject Mathematics, if not already did so, in adding the constraint;

2) Put X from 10:00 to end of day, each day (you did inversed).

[lavert]

YOU ARE STAR  REALY