Landing
Tara*Starr and others: The bounce is typically caused by lack of flare and/or to much airspeed. The flexible gear is NOT causing the bounce. It may aggravate it, but it is not the cause.
This is what happens, plane hits on nosewheel. This pops the nose back up in the air. The mains then hit, but now you are nose high. The nose high attitude of the plane (and/or probably too much airspeed) causes the plane fly again, but just barely. So plane stalls, comes in nose first again. Plane hits on nosewheel... wash, rinse and repeat...until airspeed slows enough to prevent the model from becoming airborne.
To stop this "bounce" try the following, but since I can't actually see what you are doing, ask your instructor to closely watch your landings.
Land at a slower speed. Flair more. Change to a softer tire (like all foam.)
If the bounce starts, to fix: When plane bounces up, add some power and down elevator to level plane. This should prevent the stall and the second bounce, reestablish glide and land.
Hope this helps. Cheers.