i was never taught how to sharpen a knife. but by god i learned. i found an old heavily worn sharpening stone in the basement and i had my crappy 1.99 slippy and by trial and error i figured out how to sharpen on a stone with no aids what so ever i was 11. as of now (20) i can put a decently wicked edge on any knife given enough patience and theirs some stone left. im still not great i can fudge angles but everyone dose every so often.... but yea i just feel comfortable with a stone on my lap and a cup of water. plus it gives me something to do for hours on end.