This will be a very short post. Every educator and parent of gifted children should visit Nation Deceived.
Acceleration and grade skipping are not for every intelligent kid. However, when the conditions are right emotionally, intellectually, and socially, acceleration and grade skipping are extremely beneficial. In fact, for many gifted children, failing to accelerate or skip grades could be extremely detrimental.
The link above takes you to A Nation Deceived: How Schools Hold Back America's Brightest Students. Please, read the paper. Share it. Use it to advocate for gifted children.
As a side note, look in the left navigation bar at the Nation Deceived website. Download the PowerPoint. It is a good summary. You will be asked to registered before downloading it. It will ask for a data and topic of your talk. Just enter "TBD" for both. You will be able to download the PowerPooint.