Read what Nancy McIntyre at the FUTURE Foundation has to say about VEX:
What more could I ask for in helping to develop my students into life long learners who were now empowered to modify their creations. They learned to work with Easy C programming where they could drop and drag modules and read the C code that is being developed along side the icons. Having a competition that supports what my students learn in the classroom was icing on the cake.
See this pdf for the full article.