One thing that has struck me over the years are that some parents grumble loudly about the school failing to provide for their gifted children, yet overlook all the unofficial opportunities for a gifted child to learn more that are inherent in the work they do do.
Story writing gives unlimited opportunity to stretch yourself. Most history and geography can be done to a far higher level than the bare minimum. Music lessons are offered, which gives unlimited opportunities, not least to the mathematically gifted child.
Our schools, even at infants level, also set little extra research projects that children can do at home: I remember dd doing something on Argentina. Again- this sort of thing gives absolutely unlimited opportunities for a child who wants to do extra work (not that dd did at that time- but that was her fault, not the school's).
These tasks are not limited to gifted children- but a gifted child can make so much more of them.
To some people it seems like work has to be labelled G&T to be worthwhile.