Since one week in the Astral Plane only takes one minute in the physical world, someone could set up an Academy to teach certain skills and use the Astral Plane to accelerate pace of learning.
Suppose Bob wants to teach Fred a skill, like Literacy. Instead of spending a lot of time in the physical world working on it, they both hop over to the Astral Plane instead. Now for 5 minutes of "out of body" time in the physical world, they can accomplish 5 weeks of instruction. (Yes, 5 weeks is a lot, too much really. But they could easily knockout several hours of instruction in just a few seconds of physical time.)
And thanks to the wonders of Techno-Wizardry, they don't need to have the psionic ability. One (or even both) could use a simple TW Helm of Astral Projection since there's an identical invocation.
Spoiler:
The downside, of course, is that the Astral Plane can be a dangerous place. For this to work on a recurring basis, or to set up an actually Academy, one would need a powerful benefactor in the Astral Plane to protect the endeavor.
Nonetheless, it's a nifty concept to toy with.
