I have a district that swears by TeamViewer for a remote desktop solution. I won’t say too much about it because I haven’t used it first-hand, but I’m told that it’s very easy to set up and begin using. It’s often nice to have software that can do other things like file transfer and a ‘presentation mode’ where you show an end user (or users) YOUR desktop. The TeamViewer product seems to have that as well.
Their website and various reviews talk about cross-platform functionality and accessibility through firewalls and via a browser. It also has a “lifetime license” (e.g. you buy it, you own it) rather than a yearly subscription fee. Their advertised price for a business license is $749, though I’m not sure if an educational discount is available.
If you’re looking for products in this space, you might give this one a look. As I said, one of my technical “go-to” contacts is very high on this product.