Are education programs taxable in DC?

For those of you located inside the district-- do you charge tax for your education programs?

Our head of Finance said they should be taxed under DC law, but logically that doesn't sound right to me.

Practically everything else we offer (experience-wise) is untaxed. Why in the world would a classroom program with children be taxed?

What is everyone else doing?

Major bonus points if you know what article of DC tax law addresses it.

Thanks,

Shelly Binkley

Museum of the Bible