Michael wrote:

We have the Practical Test Standards and the Soaring Flight Manual.
Due to the nature of our training, ALL US-trained pilots are familiar
with both. The former describes the checkride maneuvers and
performance standards; the latter normal operating practices. Thus we
all have the same signals, we all turn the same direction on release,
etc...

This makes me think: Why not have him read those two books? Just an idea...

Stefan