By design, FH isn't educational.
But, the environment that is created by the players can offer a lot of stimulus to be educational, however.
I know that roleplaying for several years improved my storytelling abilities and descriptive skills, and making different characters prompted me to think and research more in-depth into the animals I'd been making. A lot of people do these very things, so I think it's safe to say that the environment gives potential for it to be educational, though it wasn't the original intention of the game. On its own, it isn't really at all.
So.. FH's users are educational at times, perhaps?
I also like the social side that Sura brought out, too. Social abilities can be improved here, too. Tact, interpersonal problem solving, awareness of how your speech can affect others (for better or for worse), as well as how to advertise and lead groups in a virtual setting and keep things moving is something I learned a great deal from. Again, this is just the nature of an innately very social game.