I believe training anybody on any particular tool (even the seemingly ubiquitous Microsoft Office suite), is the wrong way to go. Talk to them about the skill (writing, creating presentations, etc), and then give some assignments across a couple of different tools. This gives you transferrable skills, which will equip you to communicate and collaborate regardless of the latest wave of tools. And that’s what’s important, in this day of increasing change.
I was just discussing this with a colleague this morning and I love Clark’s take on this.