They key is to find other parents of gifted kids. This can be hard to do because it's taboo to even talk about, so then how do you find out? If you are able to volunteer in the class that will give you a good idea of which kids are advanced, and their parents probably have similar concerns, and you can broach the topic delicately. A lot of kids don't appear to be "that" gifted and don't fit stereotypical traits, or else those traits come out later or in different ways. DS for instance acted like he couldn't care less about reading (even though he could read early) and actively resisted it at times. Now he actively reads a lot of different things and is constantly talking about what he is reading, so he fits more of the "gifted traits" that did not appear before. Gifted kids go through "phases" where they might at times seem not so gifted, or seem advanced in some areas and not others, or make a lot of progress and then regress a bit or slow way down, just like typical kids do. But I also have to say that in Kindergarten, it's going to be really hard to tell what the child is going to look like in the future because they are still changing so much at that age, and research has found that IQ is highly variable til around the middle elementary years. The kids who look very gifted in kindergarten might not look very gifted 3 years later. And vice versa. Unless you are talking about the extreme ends of the spectrum (probably the very top percentiles will stay at the top or near the top).
