I can't seem to make my reeds last longer than 3 weeks
I've been playing for about 3 months, and I want to make my reeds last for about a month.
How can I do it?

MAJOR CORRECTION: It's "oboe" O-B-O-E not "ober". Reeds wont last very long if you don't soak them before playing. I've learned this through past experience. Make sure you've placed your reeds in the proper reed case or 'gunk' will start growing inside eventually deteriorating the cane.

Sorry, I'm always making typing mistakes on the keyboard. I tryed to edit it first thing, but I didnt know how to.

I just pit the reeds in my mouth and moisten them.
I SOMETIMES put it in water for a few seconds.
How long are you supposed to soak the reeds in water?

i normally soak them for 45 seconds, but i normally get there late... you don't want to over-soak the reeds though cause that can make them really hard.

I used to soak them all the time, My music teacher told me I should put the reeds in for about 3 minutes. Does it depend on what type of reed you are using?

i usually soak it as i put my instrument together. i used to soak it for a long time, but i found about 30 seconds would do.

Soak for 1-3 minutes. Shorter time = older reed. Longer time = newer reed.
DON'T BITE.
rotate your reeds. have 4-5 at hand at any given time.
Learn to make your own.
use care when playing to prevent chipping/cracking
alex


<Added>

OH and every month or so, use a small CLEAN feather to clean the inside of your reeds, and scrape off JUST THE SURFACE of your reed to clean it. If it makes you feel better, when I started, my reeds lasted about 2 weeks. Now I have ones that are almost a year old and still playable.