What are the technical requirements?
For now, you'll need a Mac. It doesn't even have to be a laptop, an iMac or desktop would be fine as well. But you do need at least 8Gb of RAM and a relatively speedy CPU and graphics processor. For MacBook Air's in particular, we'd recommend 2017 or later. An earlier model of a more powerful computer (say, a Macbook Pro) should be acceptable, but in any case, you wouldn't want earlier than 2015.
You cannot run PIVOT Yoga teacher from an iPad or an iPhone, or from a Windows or Linux machine.
As for your students, they will need iPhones for now, though we expect an Android version soon.
You'll also need good internet bandwidth. We recommend both 5Mbps up and down, at minimum.