I have done research on the Teaching Drum, some of which has been positive. However much of it has been negative, especially from the native peoples that Tamarack Song claims to be a part of.
He claims/claimed to be of the Owl Clan of the Ojibway (Anishnaabe) nation. A lot of Anishnaabe have been up in arms about his claims.
I've also heard rumours of sexual harrassment from him to female students. But I haven't seen any solid evidence of such, so it may just be that, rumours.
Personally, as a First Nations born man, the idea of a business "teaching how to live Native" is a bit hurtful, and somewhat insulting.
The fact that it's a few grand per student, per month.. again, just doesn't sit well personally with me.
And when they heard of the dead, some mocked... and others said we will hear thee again, of this matter - Acts 17:32