I was very pleased to learn that a local high school is teaching students how to perform simple DNA database searches using their own home computers. One of the exercises is they have the kids to search for all of the homologs of the vitamin C gene and align them across species (exactly what we did here on an earlier thread before it was spammed and pulled). The concept of shared errors between closely related organisms should be enough to convince even teenagers that ID is bunk.
This might be the time to bring in Plagiarized Errors and Molecular Genetics for those who haven't seen it yet.