This could probably what I had missed out on. I didn't submit school record or the health card.Since for my kids, neither Health card or School record does not contain photos I called CIC and asked about it. Lady told me that I should submit biographical page of the passport (I submitted it twice one in section passports and second for identification purposes) and health card. This is what I have done. you should note that according to the CIC website PR cards cannot be used for identification.