"What is learning?" and "How can learning be best effectuated by a teacher/trainer?"

As this is post # 1, I felt that speaking in basics is best. Without further ado, my comments on the two questions follow:

1.What is learning? I define learning as the process whereby understanding replaces ignorance. When ten years old, I found it exileratingly fun to go down a hill on my bike while jerking my handle bars repeatedly to the left and right, which caused my bike to wobble as I sped downward. Much to my surprise, my joy lasted but moments before I found my shirtless, shoeless body flying through the air only to come to a grinding hault on the asphalt. In this incident, I was truly ignorant concerning the consequences of turning my handle bars too sharply and too quickly while riding my bike. And I especially didn't realize, unfortunately, that long, steep declines exacerbates that outcome. The school of hard knocks taught me quickly concerning that subject, and I readily learned to not make that same mistake twice.

2.How can learning be best effectuated by a teacher/trainer? In the example given above, I acknowledged my ignorance of certain aspects of gravity when they related to bike riding. That painful yet poignant lesson was something I didn't need to learn from personal experience. If a friend, parent, or older sibling explained the potential hazard (I include as an aside that I actually learned to ride my bike at the age of five, by my older brother, who taught me by pushing me down another steep grassy slope during winter (my bike was a christmas present) without training wheels), my lesson would have come sooner and a lot less painfully. In this instance, anyone with the necessary understanding would have qualified as a teacher, though probably their ability to relate that understanding in a way that I understand would also be a necessary attribute.