BelARgUSA, have you any experience of the JAA exam system? If so, you will appreciate that the JAA exams have nothing to do with flying but everything to do with rote learning so I, for one, as a middle-aged fart, can understand G-STRING's problem.
G, the school I use for CPL groundschool has the brush-up course the week before the exams i.e. next week for exams atrting the week of the 10th. It works well, helps enormously.
Perhaps there are timetabling issues with your school? There are never as many CPL students as there are ATPL, so maybe the brush-ups are run when that handful of students are all available as well?
Cheers
Whirls