At 20:30 29 January 2004, Mark James Boyd wrote:

Perhaps (slipping turns for descent are) something
I will look more at. I was never taught this, I was
never asked to
demonstrate it during a dozen check rides, and
I haven't ever seen a written reference to a slipping
turn, so I perhaps haven't thought about it much.


See the US Private & Commercial Glider Practical Test
Standards, Area of Operation IV on landings, Task R,
Slips to Landings. See also the Soaring Flight Manual
and its new FAA-published successor (whose name escapes
me).

Judy