Well, the first thing you want to do is spot your landing. You do that by arcing your back and bringing your head around so that your eye level is even with the landing. If you tuck, you aren't spotting your landing, and you are blindly flipping. Because the size of the jump will determine how fast you need to rotate, you don't really want to learn on too small of a jump. Small jumps you just huck and tuck, and you don't learn to lay out the flip and spot your landing.
Make sure to use your own discretion with your understanding of your abilities though. There is calculated risk, and then there is stupidity.