Bob,
When teaching a production or any shop class you have to make things to teach a skill set, and at the end of the day you can make things that you can use or you can make things you can toss in the trash. Anyway you do it you are going to be spending money, why not try to make a little back. We use the funds to take our kids on field trips that they could not afford any other way.
With the potter pen holder students are learning to use a CNC lathe, it just happened that this project teaches many skills in the use of a lathe: chamfering (inside and outside), male and female threads, drilling to a depth/through and flat bottom boring, multiple zero points, ect... the list goes on. So if they are being sold or not they will be made.
As for, "Selling things for $25.00 that are worth twice that amount in the real world is not the kind of lessons I want my kids to learn" Bob. if you think the price point is way to low feel free to teach your kids an econ lesson, buy the whole lot and sale them for double the price.(it is not, only sold two)
This is my only reply to this topic, this forum is a great place to learn and have a little fun lets not ruin it with Right wing, Left wing stuff.
Kyle Stapleton
River Falls Renaissance Academy
Math/Technology Education Teacher
PRS Alpha 96x60 2.2 hp spindle, Double Air drills, 6" indexer, Fein 5 zone vac table
Desktop w/spindle
Potter Pen
Aspire 8.5, Creo 3.0