Stubby wrote
The instructor calmly demonstrated how to use flaps just to
get a few more feet and complete the landing. It was a good
lesson but I think he owes me some new underwear.

Best glide distance with flaps is always less that best glide
distance flaps up. Bad demonstration...bad lesson learned.
The reason that most GA airplanes use flaps is to increase
drag and steepen the glide angle without increasing the speed.

Bob Moore