I am curious to know what is all okay. We have 12 classrooms, each with a different portfolio. When the Assessor comes through, they ask for the portfolio of the classes they observe(since it is random selection). So what i am seeing thus far is that it is OK for a center to have only one portfolio for each age group? We do not move children when they hit a birthday but at the beginning of the school year only. So some rooms that start off as infants may end up as toddlers, some that start off as toddlers may end up as preschoolers, all depending on the time of year. If one infant room is observed/assessed over another, they may have different ways that they do things and prove how they do it than the other infant room. A good side to one portfolio per age group would be collaboration with teachers. Can be difficult to get them to work together as they are not in the same classroom either. I would love to hear from NAEYC and multiple centers on this to get an idea of what people are doing in their centers.