Hi Jalmos,
I work for VEX Robotics, and we've got some pretty cool offerings you might like.
Specifically, check out our Classoom & Competition Kits:
http://www.vexrobotics.com/vex/produ...mpetition-kits
It sounds like your program could do a cool robotics class utilizing competition inside the school (or as part of the larger VEX Robotics Competition program) as a feeder to your FRC program.
Take a look at the free online curriculum we offer:
http://curriculum.vexrobotics.com/
This curriculum was written to walk students through the process of building a competition robot -- it includes details about analyzing a game, following a design process, and building a robot. It also includes lots of "core" information along the way (i.e. DC motor design, gear ratios, manipulator design, etc) which is applicable to any number of robotics design projects.
The process outlined in that curriculum is one which can be used successfully on an FRC team as well, which is why this could be such a successful feeder program.
If you have any questions, feel free to get in touch with our folks
support@vexrobotics.com or 903.453.0802 -- they'll be happy to talk to you about it.
Take Care,
-John