I'll always remember an ex-HS teacher I met. He had worked out a whole year's worth of chemistry experiments - worthy stuff with a lot of learning value - all neatly organized in one little, inexpensive box. A little modest masterpiece.

( Many small schools can't afford a big, fancy HS lab full of glassware and bunsens and labware and a closet full of chemicals. And/or the teacher didn't have the time or experience to integrate that well. )

And the result was that he couldn't get anyone to really look at it and see the advantages ... except other teachers, sometimes.

Selling the vision can be a bitch.