Whenever I give a presentation at a school on Scottish culture & I wear my kilt, I always check with the teacher & school administration, and make sure that they know about the sgain dubh, as well as the school's security officer. 90% of the time, I have never had a problem with the sgain dubh. When a teacher or administrator express some concern, then I do not wear it.

When I worked for the park service, we frequently did "off-site" school presentations about the Civil War & common soldier life. There was only one instance where I was asked not to bring a Civil War-era musket.

Cheers,

Todd