If the story was real
I get the ending, even the epilogue from the book (someone posted it here in the forums)
The kids learn superfast and become the humans 2.0, their children aren't even hungry anymore, so no more going crazy for meat. They become "normal" humans with higher intellect and they require less calories and no sleep thanks to the fungus.
But if the story was real, there would be no more trained adults for a while to keep all the nuclear power plants from melting down, and other things that require maintenance. With all the disasters on top of the fungus outbreaks, its safe to say it would be the end of mankind, the 2.0 humans would have died out from radiation and other *beep* that comes with the apocaliptic events.