Once the shield is plugged on the Arduino, the rest is ONLY programming. Where is the electronic?
Once they understand the possibilities of the technology, and have a firm grasp of the code, then we can teach the fundamentals of electronics.
Maybe not a good analogy but; if somebody helicoptered you to the top of Everest then took you down, would that make you more or less likely to learn how to climb and put in all the hard work and effort to get to the top yourself, or would you think "been there already" ?
There is nothing you can do other than connecting their parts to one another. You can't make your own pieces, can you?
The part I don't like is when schools teach with lego mindstorm, it's like they are teaching math with TI calculators. They should not tie their teaching materials to some proprietary products.
Another (good?) analogy - you do not grow your own vegtables, just to appreciate cooking - you buy them (fresh or canned).