this is theoretical just seeing if i understand for when i do start breeding rats

ok so i have 4 tubs:
tub 1: breeding rats
tub 2: for mom after she gets preggo
tub 3: males after they are weaned and waiting to be fed off
tub 4: femals after they are weaned and wating to be fed off
is this correct?? could i just have my breeders being 1.1 and keep them separated until i need them to breed more? or maybe 1.2?