I don't know if I have already posted our method somewhere else in the forum but anyways....my baby is 8 months old now, we started off with flash cards @ abt 4 1/2 months. We really did not follow the doman method...we showed her a lot more cards than doman suggested and we did it only twice a day. I did not ever retire any cards ..I just added. I always felt that the old cards when shown is more like a revision. Howvere, if u see that ur baby is getting bored when he/she sees the old cards just retire them. I haven't had that problem yet so we just keep adding cards and not retiring. The funny this is the other...I just tested her with the seven wonder card set (we haven't shown her that set in abt 1 month now) and she picked up the right cards everytime
...So I guess they don't foget things that easily. However, with the word card ...I have seen that if I havent shown something in a while and ask her to pick up from 2 cards....there are times when he would get it wrong....