Mailing the story:

In 1900, the German mathematician David Hilbert posed 23 problems in mathematics that were very influential to 20th century mathematics. Subsequently, variants of this device has been used to draw attention to additional challenges in mathematics and in other disciplines. While I am no certainly no Hilbert, I use the device here to draw attention to a number of problems—perhaps not as intractable as the Riemann hypothesis—facing the intervention of technology on learning (still in draft form):