By far competitions have the greatest impact on growth (including for girls) and offer the best challenges for gifted students.
That's a very interesting comment. Can you pinpoint what exactly it is about it that has the greatest impact on growth?
My guess would be that it has something to do with developing problem solving skills as well as the logic involved in thinking about discrete math topics.
There may also be another factor, along the lines of RR's waxing on about peer relationships (girls lifting each other up) in
this talk.
